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 = \(\frac{x}{100}\) × 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) \(\frac{3}{4}\) % of $ 780
(xi) 12 % of 620
(xii) 1.25 % of 1250 mg
(xiv) \(\frac{3}{5}\) % of 725 cm
(xv) 3^{1}/_{3} % of 90 km2. Find the value of the following:
(i) 5% of 30 m
(ii) 12% of $800
(iii) 10% of 70 km
(iv) 4.5% of 250 g
(v) 30% of $200
(vi) 12% of 100 kg
(vii) 125% of 16 l
(viii) 8% of 150 cm
(ix) 8% of 1 kg
(x) 25% of $350
3. What is 5 % of $ 1400?
4. What is 7 % of $ 7150?
5. What is 40 % of 400 kg?
6. Which is greater? Put >, < or = sign.
(i) 15% of 70 m …………. 25% of 60 m
(ii) 8% of $500 …………. 5% of $1000
(iii) 50% of 1 kg …………. 20% of 2000 g
(iv) 15% of $250 …………. 40% of $150
7. How many liters is 20 % of 15.125 liters?
8. In a public show 75 % of seats were filled. If there were 600 seats in the hall, how many seats were vacant?
9. A man earns $3580 per month and spends 65 % of it. How much money does he save every month?
10. To clear his stock a shopkeeper offers a discount of 15 %. Find the discount on goods worth $500?
11. 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?
12. In an exam, 85 % of the children pass. Find the number of children who passed, if there were 1700 children.
13. Sam bought an electric iron at a price 25% less than the original price. If the original price of the iron is $2560, at what price did Sam buy the electric iron?
14. Ron wants to buy a television. The shopkeeper agreed to give Ron Television at a price less than the original price. So Ron Just had to pay $45000 for the television with original price of $50000. What was the percentage of discount given to Ron?
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. (i) 1.5 m
(ii) $96
(iii) 7 km
(iv) 11.25 g
(v) $60
(vi) 12 kg
(vii) 20 l
(viii) 12 cm
(ix) 80 g
(x) $87.50
3. $ 70
4. $ 500.50
5. 160 kg
6. (i) <
(ii) <
(iii) >
(iv) <
7. 3.025 liters
8. 150 seats
9. $ 1253
10. $ 75
11. 1.1 kg
12. 1445
13. $1920
14.10%
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