Percents are ratios -- Problems (2)

PERCENTS ARE RATIOS

PROBLEMS (2)

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19 A store is selling clothes at a discount of 33

1
3

%. A shirt usually sells

19. for $27.

19. a) How much do you save? $9.00

19. b) How much do you pay? $18.00

10. A jacket that usually sells for $48 has been marked down 25%.
10 What do you pay? $36

11. A CD that used to sell for $16 now cost 10% more. What do you
11. pay? $17.60

12. David got a 20% raise. His old salary was $450 a week. What is his
12. new salary? $540

13. a) A store increased the price of an item by 33

1
3

%. By what percent

13 a) .must it decrease the new price in order to restore the original?

13 a) .(Compare Example 4.)

13. b) A store decrased the price of an item by 33

1
3

%. By what percent

13 a) .must it increase the new price in order to restore the original?

14. Calculator problems.

13. a) Marcia's salary was $32,500 a year, and she got a 4½% raise.
13. a) What is her new salary? $33,962.50

14. b) In 1990, the population was 26,000. In 2000, it had decreased by
13. b) 6.8%. What was the population in 2000? 24,232

14. c) A belt sells for $24.95, and the tax is 8¼%. What is the total cost
13. c) of the belt? $27.01

14. d) Chris bought a stock for $16.42. When he sold it, the price had
13. d) dropped by 9.2%. For how much did he sell the stock? $14.91

Estimations

Choose the best answer for each of the following.

15. 24.3% of $403.99.

Answers: $9.82 $98.20 $982 $9,820

$98.20. 24.3% is approximately 25%, or a quarter.

16. 243% of $403.99

Answers: $9.82 $98.20 $982 $9,820

$982. 243% is a close to 250%, which is two and a half times.

17. 19.6% of $52.14.

Answers: $1,020 $102 $10.20 $1.02

$10.20. 19.6% is approximately 20%, which is a fifth.

18. 27 is what percent of 50?

Answers: 11% 45% 53% 76%

53%. 27 is a little more than half of 50.

19. 19 is what percent of 60?

Answers: 10% 20% 30% 40%

30%. 19 is a bit less than a third of 60.

20. What percent of 6 is 20?

Answers: 30% 150% 250% 300%

300%. 20 is close to three times 6.

21. What percent of 42 is 5?

Answers: 800% 900% 12% 15%

12%. 5 is an eighth -- 12.5% -- of 40.

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