Q.1. Convert the given fractional numbers to per cents.

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

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

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

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

Ans:

Q.2. Convert the given decimal fractions to per cents.

(a) 0.65

(b) 2.1

(c) 0.02

(d) 12.35

Q.3. Estimate what part of the figures is coloured and hence find the per cent which is coloured.

Q.4. Find:

(a) 15% of 250

(b) 1% of 1 hour

(c) 20% of ₹ 2500

(d) 75% of 1 kg

Q.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.

Q.6. Convert given per cents to decimal fractions and also to fractions in simplest forms:

(a) 25%

(b) 150%

(c) 20%

(d) 5%

Ans: First convert the given percentage into fraction and then into decimal form.

Q.7. In a city, 30% are females, 40% are males and remaining are children. What per cent are children?

Q.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?

Q.9. Meeta saves ₹ 4000 from her salary. If this is 10% of her salary. What is her salary?

Q.10. A local cricket team played 20 matches in one season. It won 25% of them. How many matches did they win?

NCERT Solutions For Class 7 Maths, Chapter 8, Comparing Quantities (All Exercises)