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(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

Answer :

(a) 5% of x = 600 = \(\frac{5}{100} \)×x = 600

Or, x = \(\frac{600×100}{5} \) = 12000

(b) 12% of x = 1080 = \(\frac{12}{100} \) × x = 1080

Or, x = \(\frac{1080×100}{12} \) = 9000

(c) 40% of x =500 = \(\frac{40}{100} \) × x = 500

Or, x = \(\frac{500×100}{40} \) = 1250 km

(d) 70% of x = 14min = \(\frac{70}{100} \)×x = 14min

Or, x = \(\frac{14×100}{70} \) = 20

(e) 8% of x = 40 liters = \(\frac{8}{100} \)×x = 40 liters

Or, x = \(\frac{40×100}{8} \) = 500 litres

- Q.1 Convert the given fractional numbers to percent. (a) \(\frac{1}{8} \) (b) \(\frac{5}{4} \) (c) \(\frac{3}{40} \) (d) \(\frac{2}{7} \)
- Q.2 Convert the given decimal fractions to per cents: (?) 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 Rs. 2500 (d) 75% of 1 kg
- Q.6 Convert given per cents to decimal fractions and also to fractions in simplest forms: (a) 25% (b) 150% (c) 20% (d) 5%
- 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 Meena saves ? 400 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?

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