Question

1.72 % of 25 students are good at Mathematics. How many
are not good at it?​

Answer 1

Answer:

Step-by-step explanation:

if , students good in math = 72%

Total no. of students= 25

then, percent are used to have 100.

Therefor, 72×25÷100

= 18

Then , no of students good in math = 18

Total no. Of student = 25

Therefore, Students not good in maths = total no. of students - no. Of students good in maths

= 25–18

= 7

The no. Of students not good in maths are 7

Answer 2

Answer:

Remaining % of students = 10-1.72 = 8.28

NO. of students good at maths = 1.72% of 25

= 172/100% of 25

= 172/10000 of 25

= 172/400

= 0.43

therefore, no. of students good at maths = 1

no. of students not good at maths = 25-1 = 24