Where has this trick been all my life?
Geometry, trigonometry, algebra… high-school Mathematics is definitely no joke.
In fact, it can have a pretty stressful effect on the lives of millions of teenagers every year.
But fear no more!
A new video from Science girl on social media platform ‘X’ shows a genius way to work our percentages without a calculator.
Percentages have never been easier!
There’s more than one way to skin a cat, and there’s more than one way to solve a percentage.
Many people opt for the method of multiplying the starting number by the percentage number as a fraction.
So for example:
To get 60 percent of 80, you multiply 80 by 0.6, giving you 48.
It’s a quick and sure-fire way to get the answer you need IF you have a calculator handy.
But what if your phone is dead? What then?
Science girl percentages hack can be done in your head
The video posted to the account @gunsnrosesgirl3 demonstrates the easy hack that doesn’t require a phone or calculator.
To do a percentage, you simply divide both numbers by ten and then multiply them by each other.
So, 40 percent of 30 is 4 x 3, which equals 12.
Why is this not taught in schools?
Users have been absolutely mesmerised by the method, with many asking why we don’t learn it growing up.
One user asked: “How come I did not know about this formula?”
While another wondered: “Why is this method not popularised in educational books to teach students?”
To be honest, it’s a good question!
So, next time you’re out for dinner and need to calculate a tip, remember the teachings of Science girl.
