Chapter 7 Study Guide
Write the percent as a fraction or the fraction as a percent.
1. 9.9%
2. 56%
7
3.
4.
25
For #5-7, use a PROPORTION to answer the question.
5. What number is 45% of 180?
1
10
a
p

b 100
6. What percent of 140 is 28?
7. An artist’s collection of paintings includes 22 portraits. The portraits make up 40% of the collection.
How many paintings are in the collection?
Write the decimal as a percent or write the percent as a decimal.
8. 0.114
9. 9. 1.85
10.
22.1%
11.
202%
Use the PERCENT EQUATION to answer the question. a  p %  b
12.
What percent of 72 is 252?
13.What number is 0.5% of 3400?
Identify the percent of change as an increase or a decrease. Then find the percent of change. Round
your answer to the nearest tenth if necessary.
p% 
14.
Original: 40
New: 62
amount of change
original
15.
Original: 92
New: 23
Find the new amount. New  original  (100%  p %)
16.
Increase 650 by 24%.
17.
Decrease 248 by 12.5%.
Use the given information to find the new amount.
18.
Original price: $24
Discount percent: 30%
20. 19. Wholesale price: $14
Markup percent: 120%
Use the given information to find the total cost.
20.
Dinner bill: $100
Sales tax: 6%
Tip: 18%
21. You buy a cell phone that is 20% off the original price of $129. Find the sale price.
22. A department store purchases a dress for $80. To sell the dress to customers, the price is increased by
20%. What is the new price of the dress?
23. Suppose you deposit $900 into an account that earns 4% simple annual interest. Find the balance of the
account after 6 months. (Hint: A  P  Pr t )