Name
LESSON
Date
Class
Practice B
7-2 Ratios, Rates, and Unit Rates
For Exercises 1–3, use the bar graph to find each rate.
1. Marita’s salary per hour
Salary for 8-hour Work Day
Reiko
2. Jill’s salary per minute
Marita
Leslie
Jill
3. Reiko’s salary for 5 hours
Ginger
Cherise
0
20
40
60
80
100 120 140 160
4. A contractor gives a quote of $21,060 to remodel
a room that is 18 ft by 24 ft. What are the remodeling
costs per square foot?
5. Of the 825 cars sold by a dealer, 165 were silver.
Write a ratio for the number of silver cars sold to
the total number of cars sold.
6. An 8 oz container of yogurt has 120 calories, how
many calories are in one ounce of the yogurt?
Determine the better buy.
7. 8.2 oz of toothpaste for $2.99 or 6.4 oz of toothpaste for $2.49
8. a 3 lb bag of apples for $2.99 or a 5 lb bag of apples for $4.99
9. Mavis rides the bus every day. She bought a bus pass good for
the month of October for $38.75. How much was Mavis charged
per day for the bus pass?
10. A 16 oz bottle of soda cost $1.25. A 20 oz bottle costs $1.55.
Which is the better buy?
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
18
Holt Middle
School Math
Holt Pre-Algebra
Exploration Recording Sheet
7-2 Ratios, Rates, and Unit Rates
Puzzles, Twisters & Teasers
7-1 Testing Your Wit
LESSON
LESSON
The bar graph shows the number of acres of wilderness burned
each year from 1991 to 2000. Each bar represents a unit rate,
because it shows the number of acres burned in one year.
Draw lines to match equivalent ratios. To solve the riddle, fill in
the corresponding letters in the spaces below.
3.
4.
5.
6.
7.
8.
9.
10.
12
ᎏᎏ
16
16
ᎏᎏ
9
2
ᎏᎏ
6
16
ᎏᎏ
72
4
ᎏᎏ
12
2
ᎏᎏ
5
2
ᎏᎏ
3
13
ᎏᎏ
3
4
ᎏᎏ
10
21
ᎏᎏ
7
6
ᎏᎏ
9
5
ᎏᎏ
11
65
ᎏᎏ
15
7
ᎏᎏ
14
3
ᎏᎏ
4
1
ᎏᎏ
2
10
ᎏᎏ
22
48
ᎏᎏ
27
3
ᎏᎏ
1
8
ᎏᎏ
36
E
Acres of Wilderness Burned: 1991–2000
N
Number of acres burned
(millions)
1.
2.
W
R
T
S
E
H
9
8
7
6
5
4
3
2
1
0
S
1991 1992 1993 1994 1995 1996 1997 1998 1999
Year
2000
1. The National Interagency Fire Center (http://www.nifc.gov)
reported that an average of 3,647,883 acres were burned per
year from 1991 to 2000.
A
What’s the hardest thing about taking tests?
a. Is the average also a unit rate?
T
H
E
A
N
S
W
E
R
S
1
2
8
4
5
10
7
3
9
6
Yes, it has a second quantity of one.
b. In what years were the number of acres burned above the
average?
1994, 1996, 1997, 1999, 2000
c. In what years were the number of acres burned below the
average?
1991, 1992, 1993, 1995, 1998
Think and Discuss
2. Explain what a unit rate is.
A unit rate is a rate in which the second quantity is 1.
3. Describe real-world situations that involve unit rates.
Possible answer: miles per hour; dollars per pound
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
14
Holt Pre-Algebra
Practice A
7-2 Ratios, Rates, and Unit Rates
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
LESSON
Determine the unit rate for each.
For Exercises 1–3, use the bar graph to find each rate.
1. 2 miles in 20 minutes
2. 3 lb for $6.75
1 mile in 10 minutes
1. Marita’s salary per hour
$18.25
1 lb for $2.25
2. Jill’s salary per minute
For Exercises 1–3, use the bar graph to find each rate.
3. Roger’s heart rate for 30 seconds
41
150
5. Michael’s heart rate for 15 seconds
20
Holt Pre-Algebra
Practice B
7-2 Ratios, Rates, and Unit Rates
LESSON
4. Liam’s heart rate for 2 minutes
16
$0.30
Heart Beats per Minute
88
86
84
82
80
78
76
74
72
70
68
3. Reiko’s salary for 5 hours
$86.25
Possible answers:
Salary for 8-hour Work Day
Reiko
Marita
Leslie
Jill
Ginger
Cherise
0
20
40
60
80
4. A contractor gives a quote of $21,060 to remodel
a room that is 18 ft by 24 ft. What are the remodeling
costs per square foot?
Carlos
Liam
Michael
6. If a gallon of paint costs $18 and covers 180 ft2,
how much does it cost to paint a 900 ft2 wall?
Patrick
5. Of the 825 cars sold by a dealer, 165 were silver.
Write a ratio for the number of silver cars sold to
the total number of cars sold.
Roger
6. An 8 oz container of yogurt has 120 calories, how
many calories are in one ounce of the yogurt?
$90
100 120 140 160
$48.75
1
ᎏᎏ
5
15 calories
Determine the better buy.
7. The bookstore sold 40 biographies and
100 mysteries. Find the ratio of biographies
to mysteries sold.
2
ᎏᎏ
5
7. 8.2 oz of toothpaste for $2.99 or 6.4 oz of toothpaste for $2.49
8. Mr. Duvall worked 45 hours last week and was
paid $900. Find the ratio of hours worked to the
amount of pay in simplest form.
1
ᎏᎏ
20
8. a 3 lb bag of apples for $2.99 or a 5 lb bag of apples for $4.99
8.2 oz for $2.99
3 lb bag for $2.99
9. Randy can purchase a 12 oz container of juice for $0.85 or an
8 oz container for $0.50. Which is the better buy?
9. Mavis rides the bus every day. She bought a bus pass good for
the month of October for $38.75. How much was Mavis charged
per day for the bus pass?
8 oz for $0.50
$1.25
10. A delivery company charges $9 to deliver a 2 lb package.
A competitor charges $14.25 to deliver a 3 lb package.
Which is the better rate?
10. A 16 oz bottle of soda cost $1.25. A 20 oz bottle costs $1.55.
Which is the better buy?
$9 to deliver 2 lb package
20 oz bottle
11. A 24 oz jar of cheese sauce cost $2.88. A 16 oz jar costs $1.79.
Which is the better buy?
16 oz jar
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
17
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
Holt Pre-Algebra
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
104
18
Holt Pre-Algebra
Holt Middle
School Math
Holt Pre-Algebra