Question

72% of 35 students are good at mathematics how many are not good in mathematics

Answer 1

72 % of 35 are not good at mathematics 

it means 100 - 72 i.e. 28 % are good at mathematics 

28% of 35 

28/100 x 35 = 9.8 ≈10 students 

Answer 2

Given

9.872% of 35 are good in math

Not good in math=100%-72%=28%

28% of 35 are not good in math

28% of 35 =28x35/100= 9.8

(I think there is a mistake in value because students value can't be in decimal or fraction)

This is ur ans hope it will help you