Question

Sevens sixteenths of the children smirked when they heard the joke. If 210 children smirked, how many children heard the joke?

Answer 1

7/16 total = 210
Method 1 (the fast method):
(invert 7/16)
16/7 x 210 = 480

Ans: 480

Method 2 (the other method):
7/16 total = 210
1/16 total = 210/7 = 30
16/16 total = 16x30 = 480

Ans: 480

Answer 2

Take 716 minus by 210 you going to see a much the children joke