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Unit 4 Rates, Ratios and Percents Review

Total questions: 9

Worksheet time: 45mins

Name
Class
Date
1.

What is K the constant of Proportionality?

Hint from your STAAR chart

K= y/x

a)

9.3

b)

9.5

c)

8

d)

8.3

2.

A box of cereal weighs 14 ounces and costs $2.66. What is the price per ounce of the cereal? Hint Unit rate DIVIDE!

a)

$0.14

b)

$0.19

c)

$0.21

d)

$0.24

3.

Joey is 4 feet 8 inches tall. There are 2.54

centimeters in 1 inch. What is Joey’s height in

centimeters?


Hint Set up a proportion and solve! you can only have 2 different units.

a)

142.24 cm

b)

152.4 cm

c)

157.48 cm

d)

172.8 cm

4.

Romeo paid $380.75 in car repairs. The sales tax rate is 7.5%. Which of the following is a reasonable estimate for the total Romeo paid to repair his car?


Step 1: Change the % to a decimal

Step 2: Multiply

Step 3: Tax and tip ADD. Discount SUBTRACT

a)

$28.50

b)

$410.00

c)

$352.50

d)

$442.00

5.

Javier worked the following hours in the month of October. What was the percent increase from week 2 to week 4?


difference = %

original 100

a)

100

b)

33

c)

8

d)

32

6.

The cake walk fundraiser sold 44 tickets during the first day of sales. This was 22% of the total sales. How many tickets were sold to the cake walk fundraiser?


% = Part

100 Whole

a)

160 tickets

b)

180 tickets

c)

200 tickets

d)

240 tickets

7.

Marie purchased a $49.00 gift for a baby shower. She uses a coupon that offers 20% off. How much will Marie spend on the gift after the coupon?


Step 1: Change the % to a decimal

Step 2: Multiply

Step 3: Tax and tip ADD. Discount SUBTRACT

a)

$9.80

b)

$58.80

c)

$39.20

d)

$49.00

8.

The doctor recommended that Matt decrease the number of calories he consumed from 2,500 to 1,800. By what percent did the number of calories decrease?


difference = %

original 100

a)

28%

b)

39%

9.

Ian measures 9 kg of rice. One kilogram is approximately equal to 2.2 pounds. Which measurement represents the number of pounds of rice?


Hint** Set up a proportion and solve!

a)

18 pounds

b)

19.8 pounds

c)

21.3 pounds

d)

22 pounds