USING 5’S AND 10’S TO SOLVE 15% – THE TRADITIONAL ‘TIP’

Now we are getting into the meat of this technique. After this example we’ll start learning how to solve ANY percentage. I’ve included this example first, because it will likely be the one you use most in everyday life. Not only that, but it makes a great segue into the full technique.

What is 15%? It’s nothing more than 10% +5%!

15% of Rs 24 =

• Split 15% into 10%+5%
• Take 10% of 24 (by moving the decemal one place) = 2.4
• Take 5% of 24 (which is the same as half of 10%) = 1.2
• Add the 5% and the 10% together to get 3.6

15% of Rs 24 = Rs 3.60 EASY!!