Question

26% of 20 students are good in maths. how many are not good

Answer 1

Answer:

100% - 26% = 74%

So 74% are not good in maths.

But "of 20 students" is a bit strange!

Because 26% of 20 = .26 × 20 = 5.2

and 74% of 20 = .74 × 20 = 14.8.

So 5.2 students are good in maths and 14.8 are not good in maths.  Strange indeed!