2) If 72% of 25 students like Maths, find out the number of students w

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

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

Answer»

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

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.