Question

2) If 72% of 25 students like Maths, find out the number of students who do not like mathematics?​

Answer 1

Answer:

7 students do not like Maths.

Answer 2

Given:

• Total No of students = 25
• Percentage of students who like Maths = 72 %

What To Find:

We have to the no of students who don't like Maths.

How To Find:

• First, find % of students who don't like Maths
• Then, find the no of students who don't like Maths

Solution:

• Finding % of students who do not like Maths.

→ Percentage of students who don't like Maths = 100 % - 72 %

→ Percentage of students who don't like Maths = 28 %

∴ Thus, the % of students who do not like Maths is 28 %.

• Finding the no of students who do not like Maths

Let the no of students be x.

We will use,

⇒ $\sf{Percentage = \dfrac{No \:of \: students \: don't \: like \: Maths}{Total \: no \: of \: students} \times 100}$

Substitute the values,

⇒ $\sf{28 \: \% = \dfrac{x}{25} \times 100}$

Cancel 25 and 100,

⇒ $\sf{28 \: \% = \dfrac{x}{4}}$

Form the equation,

⇒ $\sf{x = \dfrac{28}{4}}$

Divide 28 by 4,

⇒ x = 7

∴ Thus, the number of students who don't Maths are 7.