Name _______________________________________________ Date __________________ Period ________
Percents
Study Guide
Section 1 – Percents, Decimals and Fractions
1. Write each number as a decimal, percent and fraction in simplest form.
Percent
Decimal
Fraction
334%
.015
3
16
.05%
4.2
Section 2 – Comparing and Ordering Fractions, Decimals and Percents
Order the numbers from least to greatest.
2.
9
, 220%, 2.15
4
3. 0.88,
7
8
, 90%
4. 0.67, 66%,
2
3
Sections 3 and 4 – The Percent Proportion and the Percent Equation
5. What percent of 60 is 18?
6. 40 is what percent of 32?
7. What number is 70% of 70?
8.
3
4
is 75% of what number?
9. 15% of the school parking spaces are handicap spaces. The school has 18 handicap spaces. How many
parking spaces are there?
10. Of the 25 students on a field trip, 16 students bring cameras. What percent of the students bring
cameras?
Section 5 - Discounts and Markups
Find the missing quantity
11. Original price: $50 31
12. Original price:
Discount: 15%
Discount: 20%
Sale price:
Sale price: $75
Find the selling price
13. Cost to store: $50
Markup: 10%
14. Cost to store: $80
Markup: 60%
15. Cost to store: $140
Markup: 125%
Section 6 – Simple Interest
An account earns simple interest. For each problem below, find the interest earned and the balance of the
account.
16. $300 at 4% for 3 years
17. $2000 at 3.5% for 4 years
Find the annual simple interest rate.
18. I = $17, P = $500, t = 2 years.
19. I = $426, P = $1200, t = 5 years
Find the amount of time.
20. I = $60, P = $400, r = 5%
21. I = $237.90, P = $1525, r = 2.6%
22. You put $100 in an account. The account earns $2 simple interest in 6 months. What is the annual
interest rate?
Answer Key
1.
Percent Decimal Fraction
17
334%
3.34
350
1.5%
.015
3
200
18.75%
.1875
3
16
.05%
.0005
1
2000
420%
4.2
45
1
9
2. 2.15, 220%, 4
3.
7
, 0.88, 90%
8
2
4. 66%, 3, .67
5. 30%
6. 125%
7. 49
8. 1
9. 120 parking spaces
10. 64% of students bring cameras
11. $42.76
12. $93.75
13. $55
14. $128
15. $315
16. $36; $336
17. $280; $2,280
18. 1.7%
19. 7.1%
20. 3 years
21. 6 years
22. 4%