**NCERT
Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.2**

NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities
Ex 8.2 are the part of NCERT Solutions for Class 7 Maths. Here you can find the
NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.2.

**NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.1****NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.2****NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities Ex 8.3**

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

Convert the given fractional numbers to per cents.

**Solution:**

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

Convert the given decimal fractions
to per cents.(Ð°) 0.65

(b) 2.1

(c) 0.02

(d) 12.35

**Solution:****
**(a) 0.65 = 0.65 × 100% = 65%

(b) 2.1 = 2.1 × 100% = 210%

(c) 0.02 = 0.02 × 100% = 2%

(d) 12.35 = 12.35 × 100% = 1235%

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

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

**Solution:
**(i) Fraction of the coloured part = ¼

∴ Percentage of the coloured parts

(ii)
Fraction of the coloured part = 3/5

∴ Percentage of the coloured parts

(iii)
Fraction of the coloured part = 3/8

∴ Percentage of the coloured parts

**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:
**(a) 15% of 250 = 15/100 × 250 = 75/2 = 37.5

(b) 1% of 1 hour = 1% of 60 minutes [∵ 1 h = 60 min]

**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 litres

**Solution:
**Let the required whole quantity be x.

(a) 5% of x = 600

Thus, the whole quantity is 12,000.

(b) 12% of x = ₹1080

(c) 40% of x = 500 km

(d) 70% of x = 14 minutes

(e) 8% of x = 40 litre

**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
remaining are children. What per cent are children?**Solution:
**Given: In a city, 30% are females; 40% are males and
remaining are children.

Total percentage of females and males = 30% + 40% = 70%

∴ Percentage of children = (100 – 70)% = 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:
**Total number of voters = 15,000

Percentage of the voters who voted = 60%

∴ Percentage of the voters who did not vote = (100 – 60)% = 40%

Actual number of voters who did not vote

= 40% of 15,000

= 40/100 × 15,000 = 6,000

Thus,
6,000 voters actually did not vote.

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

Meena saves ₹ 400 from her salary. If this is 10% of
her salary. What is her salary?**Solution:
**Let Meena’s salary by ₹ x.

Then 10% of x = ₹ 400

**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:****
**The number of matches played by the
cricket team = 20

Percentage of the matches won by the team = 25%

Number of matches won by the team = 25/100 × 20 = 5 matches

Thus, the number of matches won by the cricket team is 5.

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