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# Learn Exercise 8.2 with Free Lessons & Tips

Convert the given fractional numbers to per cents.

(a) (b)

(c) (d)

(a)

(b)

(c)

(d)

Convert the given decimal fractions to per cents.

(a) 0.65 (b) 2.1 (c) 0.02 (d) 12.35

(a) 0.65

(b)2.1

(c) 0.02

(d) 12.35

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

(i) Here, 1 part out of 4 equal parts are shaded which represents the fraction .

(ii) Here, 3 parts out of 5 equal parts are shaded which represents the fraction .

(iii) Here, 3 parts out of 8 equal parts are shaded which represents the fraction.

Find:

(a) 15% of 250 (b) 1% of 1 hour

(c) 20% of Rs 2500 (d) 75% of 1 kg

(a)

(b) 1 hour = 60 minutes

(c)

(d)

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

(a) 5% of x = 600

(b) 12% of x = Rs 1080

(c) 40% of x = 500 km

(d) 70% of x = 14 min

(e) 8% of x = 40 L

= 500 L

Convert given percents to decimal fractions and also to fractions in simplest forms:

(a) 25% (b) 150%

(c) 20% (d) 5%

(a) 25%

(b) 150%

(c) 20%

(d) 5%

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

It is given that 30% are females and 40% are males.

Children = (100 − 30 − 40) % = 30%

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?

Percentage of voters who voted = 60%

Percentage of those who did not vote = 100% − 60% = 40%

Number of people who did not vote = 40% of 15000

Therefore, 6000 people did not vote.
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Meeta saves Rs 400 from her salary. If this is 10% of her salary. What is her salary?

Let Meeta’s salary be Rs x.

Given that,

10% of x = 400

x = 400 × 10 = Rs 4000

Therefore, Meeta’s salary is Rs 4000.

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

Number of games won = 25% of 20

Therefore, the team won 5 matches.

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