Section PF.2 – Solutions to the Practice Problems

1.
a. 42 hours, 30%
b. -7 hours, -5%
c. 28 hours, 20%

2. 53.2%

3.
Absolute change = -$0.12
Percent change = -3.8%

4.
Absolute change = $17,000.00
Percent change = 54.8%

5.
a. $5000.00
b. 10%
c. The absolute change is probably more important to your budget since it is the amount of money that you need to come up with to pay the increase.

6. 20%

7.
Increase = 84 parts per million
Percent increase = 27.4%

8.
a. No, we only know their absolute decrease in weight.
b. Johnny (6.5%)

9. 12.5%

10. -27.5%

11.
a. 2 percentage points
b. 12.5%

12.
a. 3 percentage points
b. 25%

13. 15%

14. 5.5%