We’re sure you can think of many things you spent hours upon hours learning in maths class, which you’ve never so much as thought about in the real world.
For the majority of us, being able to work out the angle of an isosceles triangle or finding the value of ‘a’ hasn't served us much use as we make our way through life.
One of the skills which hasn't proved completely useless though is calculating percentages - it’s something we use on a daily basis. But sometimes we can still struggle when trying to split the bill between 5 people, with someone persistently reminding us they didn’t have any of the wine.
While we all have a calculator readily available in the form of our smartphones these days, it still comes in handy being able to quickly calculate a percentage off the top of your head. So when a post on Reddit revealed a super easy trick to calculate percentages, people were in shock.
The post in question read: “What's a little-known but obvious fact that will immediately make all of us feel stupid?”.
One of the replies which has since gone viral online simply stated: "Percentages are reversible. 8% of 25 is the same as 25% of 8 and one of them is much easier to do in your head."
So if you were put on the spot and told to work out 16 percent of 25 you might struggle. But 25 percent of 16 is a lot easier for our little brains to handle. We’re pretty sure this is the most useful thing we’ve learnt all year!
People were pretty blown away by how easy the trick was, with one replying: "I am tired. My first thought was bulls***, if that's true then 10% of 1 would be the same as 1% of 10... OMG."
A second wrote: "That I didn't think about this, makes me question my sanity."
Turns out we really do still learn something new every day. And some of it can be pretty life changing.
Some other fun facts that came from the post as a bonus were:
Penguins swim faster than Michael Phelps. The plural version of cul-de-sac is culs-de-sac. British cows moo in regional accents.