Ingenious Math Trick Allows You to Easily Calculate Percentages in Your Head
If you struggle with math, the idea of calculating percentages will probably send you into a mild panic. However, thanks to the wisdom of self-confessed “maths whizz” Ben Stephens, it might be easier than you think. Stephens recently tweeted a mind-blowing math trick on how to calculate percentages in your head. His surprisingly simple solution has now gone viral and left a lot of people wondering why it wasn’t taught at school.
So what’s the secret formula? It’s simple: x% of y = y% of x. Stephens explains, “So, for example, if you needed to work out 4% of 75 in your head, just flip it and and do 75% of 4, which is easier.” If you haven’t already worked it out, the answer is 3, and the easy trick can be applied to any set of numbers. “18% of 50 feels hard to calculate,” Stephens tweeted. “But 50% of 18 is a doddle, right?” You got it—9!
Most people on Twitter reacted gratefully to Stephens’ revealing method, and some even asked if he could tutor them. “I am neither a math guy nor a teacher,” he writes. “I just learned this and thought it was cool, so I decided to share it on Twitter, and it seems to have become one of my most popular tweets ever.”
Try this new method out for yourself and see more from Stephens’ mental math conversions on Twitter.
If you struggle with how to calculate percentages, this trick revealed by “maths whizz” Ben Stephens might help.