1. Fill in the Missing Information in the Chart Below

Name: ______Date: ______

Quiz 7.1

8th Grade Pre Algebra

1. Fill in the missing information in the chart below.

Fraction / Decimal / Percent
.28
32%
0.001

Use the PERCENT PROPORTION to solve the following problems. Show ALL YOUR WORK and box your final answer. Round to the nearest 10th when necessary.

2. What is 39% of 615? 3. What percent of 93 is 100?

4. 14 is 12.5% of what number? 5. 4 is what percent of 1?

Use the PERCENT EQUATION to solve the following problems. Show ALL YOUR WORK and box your final answer. Round to the nearest 10th when necessary.

6. 36 is 45% of what number? 7. What is 56% of 42?

8. What percent of 136 is 40? 9. 75 is 20% of what number?

Find the percent of change of the problems below. Make sure you include if it is a decrease or an increase. Show all your work and box your final answer. Round to the nearest 10th when necessary.

10. Going from 14 to 36 11. Going from 120 to 65

Find the new amount for the problems below. Show all your work and box your final answer. Round to the nearest 10th when necessary.

12. 45 increasing by 25% 13. 90 decreasing by 30%

Solve the following word problems. Show all your work and box your final answer. Round to the nearest 10th when necessary. Write your final answer as a sentence.

14. In the 2002 World Cup, 5 of the 32 soccer teams that competed were from

South America. What percent of the teams were from South America?

15. A total of 600 tickets were sold for a raffle. The probability that your friend

will win the prize is 7%. How many of the raffle tickets were not bought by

your friend?

16. A salesperson earns 4% commission on the sales of televisions. If the

salesperson’s television sales total $7000, how much is their commission?

17. In 1991, the price of a hot dog at a Texas baseball stadium was $1.25. In 2001,

the price of the hot dog at the same stadium was $2.25. By what percent did

the price change from 1991 to 2001?

18. In 2002, the average price of a DVD was $23.50. By 2013, the average price has

decreased by 23%. What was the average price of a DVD in 2013?

BONUS (+2)

The length l of a rectangle is 180% of its width. Write the formula for the perimeter P of the rectangle in terms of w only. (Use the formula P = 2w + 2l)