Applying Percents to Discounts and Sales Quiz � Real-Life Practice (7.RP.A.3)

1) A waiter earns 15% tip on a $100 bill. How much is the tip?

$10

$12

$15

$20

10% of 100 = 10, 5% = 5, total = 15.

Explanation

10% of 100 = 10, 5% = 5, total = 15.

2) A $250 TV has a 10% sales tax. The tax is:

$20

$22

$25

$28

10% of 250 = 25.

Explanation

10% of 250 = 25.

3) A 5% sales tax on $200 is $15.

True

False

10% of 200 = 20. Half (5%) = 10, not 15.

Explanation

10% of 200 = 20. Half (5%) = 10, not 15.

4) If a population increases by 20% from 1,000, what is the new population?

1,100

1,150

1,200

1,250

20% of 1,000 = 200. New total = 1,200.

Explanation

20% of 1,000 = 200. New total = 1,200.

5) A $60 shirt is discounted by 20%. What is the sale price?

$40

$45

$48

$50

10% of 60 = 6. Double that = 12. Subtract: 60 – 12 = 48.

Explanation

10% of 60 = 6. Double that = 12. Subtract: 60 – 12 = 48.

6) Commission of 10% on a $500 sale is $60.

True

False

10% of 500 = 50, not 60.

Explanation

10% of 500 = 50, not 60.

7) A bill is $80. If the tax is 5%, how much is the total bill?

$82

$84

$85

$86

5% of 80 = 4. Add tax → 80 + 4 = 84.

Explanation

5% of 80 = 4. Add tax → 80 + 4 = 84.

8) An item costs $50 before tax. If tax is 8%, what is the final price?

$52

$53

$54

$55

8% of 50 = 4. Add tax → 50 + 4 = 54.

Explanation

8% of 50 = 4. Add tax → 50 + 4 = 54.

9) A $400 phone is discounted by 25%. The discount amount is:

$50

$75

$100

$125

25% = 1/4. One-fourth of 400 = 100.

Explanation

25% = 1/4. One-fourth of 400 = 100.

10) A restaurant bill is $120. A 10% tip is added. What is the total?

$126

$128

$130

$132

10% of 120 = 12. Add → 120 + 12 = 132.

Explanation

10% of 120 = 12. Add → 120 + 12 = 132.

11) An item costs $90. If there’s a 30% discount, what is the sale price?

$60

$63

$65

$70

30% of 90 = 27. 90 – 27 = 63.

Explanation

30% of 90 = 27. 90 – 27 = 63.

12) If 40% of a number is 80, what is the number?

150

180

200

220

80 ÷ 0.4 = 200.

Explanation

80 ÷ 0.4 = 200.

13) A shopkeeper earns 12% commission on sales of $2,000. How much commission does he earn?

$200

$220

$230

$240

10% = 200, 2% = 40 → 240.

Explanation

10% = 200, 2% = 40 → 240.

14) A student scored 72 out of 80. What percent is this?

85%

88%

90%

92%

72 ÷ 80 = 0.9. ×100 = 90%.

Explanation

72 ÷ 80 = 0.9. ×100 = 90%.

15) If a student got 36 marks out of 60, what percent is this?

50%

55%

60%

65%

36 ÷ 60 = 0.6. ×100 = 60%.

Explanation

36 ÷ 60 = 0.6. ×100 = 60%.