PERCENTS ARE RATIOS

PROBLEMS (2)

Do the problem yourself first!

 19  A store is selling clothes at a discount of 33 13 %.  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 13 %. By what percent

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

13  a) .(Compare Example 4.)

25%

 13.  b)  A store decrased the price of an item by 33 13 %. By what percent

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

50%

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.

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

16.   243% of \$403.99

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

17.   19.6% of \$52.14.

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

18.   27 is what percent of 50?

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

19.  19 is what percent of 60?

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

20.   What percent of 6 is 20?

300%.  20 is close to three times 6.

21.   What percent of 42 is 5?

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

Continue on to the next Lesson.

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