Practice the questions given in the worksheet on percentage of a number.
We know, to find the percent of a number we obtain the given number and then multiply the number by the required percent i.e., x % of a = x/100 × a
1. Find the following:
(i) 22 % of 140
(ii) 25 % of $ 750
(iii) 16.5 % of 5000 kg
(iv) 2^{1}/_{2} % of 80 l(v) 0.4 % of 8 km
(vi) 120 % of 1000
(vii) 12 % of 360 m
(ix) 0.8 % of 250 g
(x) 3/4 % of $ 780
(xi) 12 % of 620
(xii) 1.25 % of 1250 mg
(xiv) 3/5 % of 725 cm
(xv) 3^{1}/_{3} % of 90 km2. What is 5 % of $ 1400?
3. What is 7 % of $ 7150?
4. What is 40 % of 400 kg?
5. How many liters is 20 % of 15.125 liters?
6. In a public show 75 % of seats were filled. If there were 600 seats in the hall, how many seats were vacant?
7. A man earns $3580 per month and spends 65 % of it. How much money does he save every month?
8. To clear his stock a shopkeeper offers a discount of 15 %. Find the discount on goods worth $500?
9. An alloy of copper and zinc contains 45 % of copper and the rest is zinc. Find the weight of the zinc in 2 kg of the alloy?
10. In an exam, 85 % of the children pass. Find the number of children who passed, if there were 1700 children.
`Answers for the worksheet on percentage of a number are given below to check the exact answers of the above questions.
Answers:
1. (i) 30.8
(ii) $ 187.50
(iii) 825 kg
(iv) 2 l
(v) 32 m
(vi) 1200
(vii) 43.2 m
(viii) 4/25 l
(ix) 2 g
(x) $ 5.85
(xi) 74.4
(xii) 15.625 mg
(xiii) $ 162.50
(xiv) 4 .35 cm
(xv) 3 km
2. $ 70
3. $ 500.50
4. 160 kg
5. 3.025 liters
6. 150 seats
7. $ 1253
8. $ 75
9. 1.1 kg
10. 1445
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