Percent
Proportion &
Equation
Percent of
Change
Percent of
Error
Tax and
Discounts
Simple
Interest
5 pt
5 pt
5 pt
5 pt
5 pt
10 pt
10 pt
10 pt
10 pt
10 pt
15 pt
15 pt
15 pt
15 pt
15 pt
20 pt
20 pt
20 pt
20 pt
20 pt
25 pt
25 pt
25 pt
25 pt
25 1pt
What percent of $90 is $9?
2
10%
3
What number is 20% of 35?
4
7
5
62 is 90.5% of what number?
6
68.5
7
Of the 60 books on a bookshelf, 24
are nonfiction. What percent of the
books are nonfiction?
8
40%
9
Roman has 2 red pencils in his
backpack. If this is 25% of the total
number of pencils, how many
pencils are in his backpack?
10
8 pencils
11
15 yards to 18 yards
12
20%
13
132 days to 125.4 days
14
5%
15
Last school year the enrollment of
Genoa Middle School was 465
students. This year the enrollment is
525.
16
12.9%
17
Tara purchased a DVD player for
$150. Six months later, the same
DVD player was selling for $120.
What was the percent of decrease?
18
20%
19
In one year, Braden’s height went
from 60 inches to 63 inches. What
was the percent of increase in
Braden’s height?
20
5%
21
Estimated: 13.5 lbs
Actual: 15.6 lbs
22
13.5%
23
Estimate: 75
Actual: 126
24
40.5%
25
George estimated that there were
315 students at a basketball game.
The actual number of students at the
game was 350. What was the
percent of error of his estimate?
26
10%
27
In an experiment, a chemist
estimated the amount of liquid in a
beaker to be 52 milliliters. The
actual amount of liquid in the beaker
was 50 milliliters. What was the
percent error?
28
4%
29
Dane estimated that there were 420
people at a concert with him. The
actual number of people at the
concert was 375. What was the
percent error of Dane’s estimate?
30
12%
31
A haircut costs $20. Sales tax is
4.75%. How much will the haircut
cost all together?
32
$20.95
33
American Eagle pays $56 for their
brown parka. They add 25% to the
price & sell it to the customers. Find
the selling price.
34
$70
35
A pair of in-line skates is on sale for
$98. If this price is discounted 9% ,
what is the final price of the skates?
36
$89.18
37
Joe is buying a t-shirt for $12.99, a
pair of shoes for $59.95, and
sunglasses for $13.50. If he has a
coupon for 15% off his total
purchase and sales tax is 6%, how
much did he pay? Round your
answer to the nearest cent.
38
$77.88
39
Sara earns a 15% commission on
furniture she sells. How much
commision would she earn if she
sells a dining room set for $850, a
chair for $400, and a rug for $75?
40
$198.75 – commision
41
How much simple interest will they
pay?
Principal - $300
Interest Rate – 4%
Term – 6 months
42
$6
43
Victoria deposited $2500 into a
savings account that pays her simple
interest. The interest rate is 3%.
How much interest will Victoria earn
in 2 years?
And what will her balance be?
44
Interest: $150
Balance: $2650
45
Tina took out a 6 year loan for
$18000 to buy a new car. She has to
pay 2% simple interest on the loan.
How much will Tina have paid in all
after the 6 years?
46
$20,160
47
Leon borrowed $75 at an interest
rate of 12.5%. How much will Leon
have to pay after 9 months if he
makes no payments?
48
$82.03
49
Pablo has $4200 to invest for
college. If Pablo invests $4200 for 3
years and earns $630, what is the
simple interest rate?
50
5%
51