CBSE students can refer to NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.2 Textbook Questions and Answers are provided by experts in order to help students secure good marks in exams.

## Class 7 Maths NCERT Solutions Chapter 8 Comparing Quantities Ex 8.2

**Ex 8.2 Class 7 Maths Question 1.**

Convert the given fractional number to percents:

**(a)** \(\frac { 1 }{ 8 } \)

**(b)** \(\frac { 5 }{ 4 } \)

**(c)** \(\frac { 3 }{ 40 } \)

**(d)** \(\frac { 2 }{ 7 } \)

**Solution:
**

**Ex 8.2 Class 7 Maths Question 2.**

Convert the given decimal fractions to per cents.

**(a)** 0.65

**(b)** 2.1

**(c)** 0.02

**(d)** 12.35

**Solution:
**

**Ex 8.2 Class 7 Maths Question 3.**

Estimate what part of the figures is coloured and hence find the percent which is coloured.

**Solution:
**

**Ex 8.2 Class 7 Maths Question 4.**

Find:

**(a)** 15% of 250

**(b)** 1% of 1 hour

**(c)** 20% of ₹ 2500

**(d)** 75% of 1 kg

**Solution:
**

**Ex 8.2 Class 7 Maths Question 5.**

Find the whole quantity if

**(a)** 5% of it is 600

**(b)** 12% of it is? 1080

**(c)** 40% of it is 500 km

**(d)** 70% of it is 14 minutes

**(e)** 8% of it is 40 liters

**Solution:
**

**Ex 8.2 Class 7 Maths Question 6.**

Convert given per cents to decimal fractions and also to fractions in simplest forms:

**(a)** 25%

**(b)** 150%

**(c)** 20%

**(d)** 5%

**Solution:
**

**Ex 8.2 Class 7 Maths Question 7.**

In a city, 30% are females, 40% are males and the remaining are children. What percent are children?

**Solution:**

In a city,

Percentage of females = 30%

Percentage of males = 40%

Percentage of children = (100 – 30 – 40)% = 30%

**Ex 8.2 Class 7 Maths Question 8.**

Out of 15,000 voters in a constituency, 60% voted. Find the percentage of voters who did not vote. Can you now find how many actually did not vote?

**Solution:**

100% – 60% = 40% did not vote.

Number of voters who did not actually vote = 40% of 15,000

= \(\frac { 40 }{ 100 } \) × 15000

= 6000.

**Ex 8.2 Class 7 Maths Question 9.**

Meeta saves ₹ 400 from her salary. If this is 10% of her salary, what is her salary?

**Solution:
**

**Ex 8.2 Class 7 Maths Question 10.**

A local cricket team played 20 matches in one season. It won 25% of them. How many matches did they win?

**Solution:**

Let the total number of matches won be P. Then,

25% of 20 = P

⇒ \(\frac { 25 }{ 100 } \) × 20 = p

⇒ 5 = p

⇒ p = 5

Hence, they won 5 matches.