Your teacher, mom, and virtually any adult with a thoughtful mind would never approve of Twitter as a learning tool. And how would they with this whole infinite source of the not-very-serious side of the internet where memes, jokes, and burns are roaming free?

But people are proving them wrong by sharing incredible facts brought to them by Twitter that should have been put in the textbooks. From realizing the symbol “&” is a ligature for the word "et" to finding out that an 18-inch pizza has more of a good thing than two 12-inch pizzas, these are some of the facts that could have been part of my wisdom bank this whole time.

So scroll down, upvote your faves, and after you’re done with this post, check out our previous list of 30 random facts that will make you feel "today years old."

#1

Truth Monster
Community Member
2 months ago

Fair enough

#2

hispanic! at the disco
Community Member
2 months ago

And still today, Natives are being harassed by police for protesting there peacefully. Nothing much has changed..

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#3

Foxxy (The Original)
Community Member
2 months ago

I am just confuzzled.

Fireflower
Community Member
2 months ago

4% of 75 = 75% of 4. 4% of 75 = 4 x (0.75) 4% of 75 = 4 x (3/4) 4% of 75 = 3 Proofs are easier to visualize, I hope this helps!

Daniel Lewis
Community Member
2 months ago

This works because in calculating a percentage, you can move the decimal point two places to the left (since percent literally means part per 100) either before or after the multiplication operation and you will get the same answer. It also involves the commutative property of multiplication. e.g. 4% of 75. Change 4% to 0.04 and multiply by 75 = 3. Or multiply 4 times 75 = 300 (or 75 times 4 = 300). Move the decimal point = 3. Basically, this method consists of multiplying two numbers together and then moving the decimal point two places to the left.

yes.
Community Member
2 months ago

OH YEAHHHHHHHHHH this is kinda crazy but so cool

Alpa Lotlikar
Community Member
2 months ago

Shut. Up. You just changed my life.

Captain Legible
Community Member
2 months ago

An easy way to look at this: per cent means "per hundred" or "divide by a hundred", and "of" means "multiply" when fractions are about. So 4% of 75 is (4/100)x75 and 75% of 4 is (75/100)x4, so they're both just (75x4)/100.

karin s.
Community Member
2 months ago

how can this get down votes - it is the correct explanation and proof of the hack.

Shauna
Community Member
2 months ago

It works. I wish I knew this a long time ago.

Bob Belcher
Community Member
2 months ago

Same reason why 3 x 4 is 12 and 4 x 3 is 12.

Daniel Lewis
Community Member
2 months ago

So you are saying that e^(3/√7)% of √(π^(5/e)) = √(π^(5/e))% of e^(3/√7).

R L
Community Member
2 months ago (edited)

Yes, exactly. It's so easy! ......🤯 😕

Rebekah
Community Member
2 months ago

WHY DID NO ONE TELL ME THIS????

Jesse
Community Member
2 months ago

It used to be part of the daily life skills curriculum taught at schools. But beginning in the 1970s curriculums were commercialized and "tricks which do not explain or utilize core concepts" were sidelined. There's a solid argument there, but that's the case with many bad ideas. At the end of the day the academic "tricks" used so successfully to build the post war infrastructure and economy were discarded in the name of commerce to sell textbooks.

Louloubelle
Community Member
2 months ago

Something a little similar. I had a friend that couldn't figure tipping. I know some of you are from outside the US, but 15-20% is considered usual. My friend and I tend to be good tippers at 20%, plus it's easier. I told her just figure 10% and multiply it by 2. 10% is much easier to figure on a bill than 20.

Alex Newell
Community Member
2 months ago

I did a similar trick when doing mental math in highschool. I'd move the decimal once for the 10%, then move it again for 1% and multiply by 5. People probably thought I was a witch.

Daniel Lewis
Community Member
2 months ago

This comment has been deleted.

Daniel Lewis
Community Member
2 months ago

This comment has been deleted.

tuzdayschild
Community Member
2 months ago

Noel Bovae
Community Member
2 months ago

For those still confused: 50% of something is easy, right? 50% of 20 is 10. But trying to figure out 20% of 50, now that sounds a bit more difficult. This trick is showing you that the answer is still going to be 10. Because 50% of 20, is exactly the same thing as 20% of 50.

Kisses4Katie
Community Member
2 months ago

So 3? Is 3 4% of 75? I need to get good at math. I'm about to go to school for science! 😮

Monika Soffronow
Community Member
2 months ago

NICE!

Rare Wubbox
Community Member
2 months ago

I…I have no words. It works.

Vicky Zar
Community Member
2 months ago

Wow. Never knew that. They should teach that in school!

Dorothy Cloud
Community Member
2 months ago

Now, that is something I will be able to use in my life. Why wasn't that ever told before?

Nothanks L. Walk
Community Member
2 months ago

See this is the problem with murican diseducation : kids memorise & regurgitate, but learn nothing. This is not a life hack, this is basic understanding of how multiplication works and why. Half the things I should have learned in middle & high school, I had to teach myself later in life because I discovered I was using memorised times tables instead of understanding mathematics, and memorised spellings instead of an understanding of linguistic structure.

Lisa Chambers
Community Member
2 months ago

lol I am good. I shop sales and can calculate that easily.

Caroline Melzer
Community Member
2 months ago

Yeah - I still can't Math

Eunice Bentley
Community Member
2 months ago

well I'll be darned

Community Member
2 months ago

I don't mathematics

Jessica Cifelli
Community Member
2 months ago

Fern Shoemaker
Community Member
2 months ago

Omigod math i scary! That have me house bumps. You'd better not teach me anything else. Just to be safe.

Daniel Lewis
Community Member
2 months ago

Masaya Ichikawa
Community Member
2 months ago

Right!

Marcellus the Third
Community Member
2 months ago

How is that a hack? It's just the definition of fractions. E.g. 1/3rd of 2 is 2/3rd of 1. Percents are just fractions of 100.

Iapetos
Community Member
2 months ago

Cooooool! Thank you!

Blackheart
Community Member
2 months ago

Love this!

Elida Lechuga
Community Member
2 months ago

Omg, it works.

Jay Loren
Community Member
2 months ago

Nice

Daniel Lewis
Community Member
2 months ago

There are an infinite number of calculations that are not as easy as your example. It is extremely obvious that you deliberately chose an example that is easy to solve.

Nathan Jones
Community Member
2 months ago

I agree. My first thought was ok hot shot, tell me 7% of 29.

David Viesta
Community Member
2 months ago

You lost me at the word "percentages".

William McGivney
Community Member
2 months ago

No s**t! It's obvious to me now. Wow

Cee Mor
Community Member
2 months ago

WHAT...that is a much easier way to do %

LittleMissPanda
Community Member
2 months ago

Bamboozzled

Loki’s Lil Butter Knife
Community Member
2 months ago

I would have done a lot better in maths if I had known this.

Community Member
2 months ago

i am hoping that i learned this, but forgot! its so simple!

ElusiveIntrovert
Community Member
2 months ago

Mind = blown

Daniel Lewis
Community Member
2 months ago

or Blown = Mind

chi-wei shen
Community Member
2 months ago

We actually learned this in school.

Tim Stoneman
Community Member
2 months ago

Works up to 100

Daniel Lewis
Community Member
2 months ago

It works with numbers larger than 100. You could have easily checked this.

CR Harvey
Community Member
2 months ago

I'll learn this ha k when I've finished learning metric conversion in my head.

Mildred Thompson
Community Member
2 months ago

Its the same no matter which wayyou do it!

Jo Choto
Community Member
2 months ago

Ooh, I can't believe I didn't know that. I love this information.

Tim
Community Member
2 months ago

Do what I do. Multiply the two numbers and then divide by 100. It works every time. No tricks.

Laughinmydreams
Community Member
2 months ago

Hey, it works!

manon M
Community Member
2 months ago

Mais c'est incroyable 😲

Anna Witt
Community Member
2 months ago

Really? Can you think of anything else that will confuse us even more?

Sergio Serg
Community Member
2 months ago

Duuuuuude...!

Community Member
2 months ago

This comment has been deleted.

Daniel Lewis
Community Member
2 months ago

If you are trying to be a troll, you are not doing a very good job of it.

Honeybuzz
Community Member
2 months ago (edited)

I learned this at school🤔 it's part of basic fractions lessons in India. Is it not in other countries?

Camilla Gonzales
Community Member
2 months ago

3

Berlinda Dunbar-Nye
Community Member
2 months ago

I like that. :-)

Suzanne Haigh
Community Member
2 months ago

???

AndersM
Community Member
2 months ago

I'm don't get it?? And how can that be easier?

Jace
Community Member
2 months ago

Could’ve had a better explanation. I’ve a literal math disability... so I’m still iffy on this.

Kenny Oesch
Community Member
2 months ago

why dont you just y times 0.xx(percent) way easier...

Noez 🇸🇪
Community Member
2 months ago

Welp...

Tom Brock
Community Member
2 months ago

you can do your 9 times table with your fingers. Wish i knew that in school

Peet
Community Member
2 months ago

This is what you learn at the age of 10... Don't pretend this guy needs a Nobel prize...

Kenny Oesch
Community Member
2 months ago

why dont you just calculate y times 0.xx percent? thats the easiest way....

Demongrrrrl
Community Member
2 months ago

I was an English major. I let others do the math.

Nagawa (Cofa) Kishiki
Community Member
2 months ago

That's why I always love the number zero.

Anna Neemus
Community Member
2 months ago

Mind BLOWN

XianJaguar
Community Member
2 months ago

WHAT WITCHERY IS THIS? 0_o

El Dee
Community Member
2 months ago

I only found this out last week. I can get that our teachers wanted us to actually DO the maths BUT the whole point of school is to prepare you for life..

Michelle C.
Community Member
2 months ago

IS IT EASIER?!

Benevolent Panda Mouse
Community Member
2 months ago

Math....nope.

Edward
Community Member
2 months ago

Yeah, if the second equation has a whole remainder. How the fuck is 7% of 75 easier than 75% of 7?

Martti Laurson
Community Member
2 months ago

You got it backwards. He said 75% of 7 is easier, not 7% of 75. Maybe you should take a reading lesson too

Paizleypie
Community Member
2 months ago

I HATE math.

Grumble O'Pug
Community Member
2 months ago

Yup

MnM2520
Community Member
2 months ago

Was that English?

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Look, I am not saying we should believe all that Twitter has to offer. But it turns out, the things we were taught at school are not so innocent either. Some facts we still believe to this day are complete myths, and they had better be laid out bare before you become "today years old" to realize they aren’t true.

You probably would place a pretty high bid on the fact that Columbus discovered America. You’re not the only one. A 2005 survey showed that 85% of Americans believed Columbus discovered the continents and only 2% correctly answered that he couldn’t have discovered America because it was already inhabited by Native Americans.

#4

Whitehart
Community Member
2 months ago

Caligula declared victory and his soldiers brought back chests full of seashells as proof.

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#5

Gareth Graham
Community Member
2 months ago

The London Underground maintain several stations that trains never use. They are reserved for TV and movie locations so as not to close down functioning stations

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#6

None
Community Member
2 months ago

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Another fact which turns out to be a myth is the tongue map idea, which suggests that different parts of our tongues identify different kinds of tastes. However, the University of Florida Center for Smell and Taste stated that “the locations of those taste buds aren't in accordance with the 'tongue map.'” And even if taste buds are indeed receptive to certain types of tastes, the difference in reality is tiny.

You've probably heard how Einstein failed math in school and was not an A student in general. It turns out, the only exam he failed was an entrance test to the Zurich Polytechnic he had to take in French, which he didn’t speak well at the time.

#7

hispanic! at the disco
Community Member
2 months ago

I wish people could do that

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#8

WilvanderHeijden
Community Member
2 months ago

Printer ink can cost up to \$5000 per 1 liter. (0.26 US Gallon)

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#9

స్టీఫెన్ ఆండ్రూ
Community Member
2 months ago (edited)

Let's just ignore the human rights abuses suffered by the Nepali minority group...

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#10

hispanic! at the disco
Community Member
2 months ago

Well aren't we all special.

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#11

Indra Servo
Community Member
2 months ago

Well...there is no internet in 1600s, guys must be bored

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#12

Shelp
Community Member
2 months ago

One more reason not to display babyb skulls in your house

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#13

chi-wei shen
Community Member
2 months ago

A small group of wooly mammoth existed on Wrangel Island in the Arctic Ocean until about 2000 B.C.

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#14

Martti Laurson
Community Member
2 months ago

I'm in Estonia, so I'm good

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#15

Tom Hardeveld
Community Member
2 months ago

I used to know this...

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#16

Lil Bare
Community Member
2 months ago

The earth is secretly ruled by mushrooms and cats

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#17

Mishte Tine
Community Member
2 months ago

She’s also small and behind a ton of protection. She’s beyond amazing.

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#18

Shelp
Community Member
2 months ago

...which is perfectly logical if you have French or Latin as your first language

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#19

Community Member
2 months ago

It is hard to imagine millions of years----

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#20

Sergio Bicerra Descalzi
Community Member
2 months ago

Read a funny story about him. He used to pay meals with checks. People didn't cash them cause Dali's signature was more worthy than the pay, so he got many free meals doing so. Not sure if its true, but like this story.

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#21

Tiny Dynamine
Community Member
2 months ago

Did you know you can get free extra pizza slices if you cut your pizza into 8 pieces instead of 6? ;)

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#22

Aisha Boudy
Community Member
2 months ago

Googol Plex (it's a number) is so large that if u wrote each of its zeros on separate atoms in the universe, there won't be enough space to finish writing all the zeros.

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#23

Saurin Apriliawan
Community Member
2 months ago

My identical twin cousin just told me that, although wearing exactly the same clothes and has quite similar voice, their toddlers can still tell them apart.

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#24

Daniel Lewis
Community Member
2 months ago

How many indistinct human faces can they recognize?

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#25

giovanna
Community Member
2 months ago

Well I guess it would be useless to know anyway 😬

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#26

Gareth Graham
Community Member
2 months ago

Amy Schumer time travelling again?

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#27

Clare Bond
Community Member
2 months ago

And some people never develop beyond that point !!!

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#28

Daniel Lewis
Community Member
2 months ago

Because humans polluted the water.

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#29

WilvanderHeijden
Community Member
2 months ago

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