Practice the questions given in the worksheet on percentage of a given quantity.

We know, to determine the exact value of a percent of a given quantity we need to express the given percent as fraction and multiply it by the given number.

**1.** If a man spends 70 % of his income, what % does he save?

**2.** A girl gets 65 marks out of 80. What percent marks did she get?

**3.** An alloy contains 64 % of zinc. How many kg of alloy is required to get 372 kg of zinc?

**4.** A classroom contains 25 children, out of which 6 are girls. What percentage of the class are boys?

**5.** Steve deposits $ 1800 per month in his savings bank account. If this is 20 % of the monthly income, find his monthly income.

**6.** A tin contains 20 litres of petrol. Due to leakage, 3 litres of petrol
is lost. What percent is still present in the tin?

**7.** In an election, a candidate got 82 % votes. He won the election
beating his rival candidate by 576 votes. How many votes were polled?

**8.** A boy got 60 out of 80 in French, 70 out of 90 in English and 35
out of 40 in Mathematics. In which subject his percentage of marks is best?

**9.** Arthur did not go to school for 36 days in a year. If his absence
from school is 15 %, find the number of days the school opened.

**10.** In a camp, there were 500 solders. 60 more solders joined them.
What percent of the earlier (original) number have joined?

**11.** Gunpowder contains 65 % nitre, 15 % sulphur and the rest of it is
charcoal. Find the amount of nitre, sulphur and charcoal in 8 kg of gun powder.

**12.** In a plot of ground of area 6000 sq. m, only 4500 sq. m. is allowed
for construction. What percent is to be left without construction?

**13.** In a school there are 1800 boys and 1200 girls. In an exam only 32 %
of the boys passed and 50 % of the girls passed. Find the percentage of the
total who did not pass.

**14.** Mr. Baker has a monthly salary of $ 7,500. If he spends $ 6,250
every month; find:

(i) his expenditure as percent.

(ii) his savings as percent.

(iii) his total savings in one year.

**15.** Thomas scored 90 % marks in maths, 85 % in science, 80 % marks in
social sciences and 75 % in languages. If the maximum mark in maths is 200, in
science 150, in social sciences 150 and languages 100, find his aggregate
percentage.

Answers for the worksheet on percentage of a given quantity are given below to check the exact answers of the above questions.

**Answers:**

**1.** 30 %

**2.** 81.25 %

**3.** 581.25 kg

**4.** 76 %

**5.** $9000

**6.** 85 %

**7.** 900 votes

**8.** Mathematics (87.5 %)

**9.** 240 days

**10.** 12 %

**11.** Nitre 5 kg 200 grams, sulphur 1 kg 200 grams and charcoal 1 kg 600 grams.

**12.** 25 %

**13.** 60.8 %

(ii) 16

(iii) $ 15,000

**15.** 83.75 %

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