5-1
Exercises
KEYWORD: MS7 5-1
KEYWORD: MS7 Parent
GUIDED PRACTICE
See Example 1
Sun-Li has 10 blue marbles, 3 red marbles, and 17 white marbles.
Write each ratio in all three forms.
1. blue marbles to red marbles
2. red marbles to total marbles
See Example 2
3. In a 40-gallon aquarium, there are 21 neon tetras and 7 zebra danio fish.
Write the ratio of neon tetras to zebra danio fish in simplest form.
See Example 3
4. Tell whose DVD collection has
the greater ratio of comedy
movies to adventure movies.
Joseph
Yolanda
Comedy
5
7
Adventure
3
5
INDEPENDENT PRACTICE
See Example 1
See Example 2
See Example 3
A soccer league has 25 sixth-graders, 30 seventh-graders, and 15
eighth-graders. Write each ratio in all three forms.
5. 6th-graders to 7th-graders
6. 6th-graders to total students
7. 7th-graders to 8th-graders
8. 7th- and 8th-graders to 6th-graders
9. Thirty-six people auditioned for a play, and 9 people got roles. Write the ratio
in simplest form of the number of people who auditioned to the number of
people who got roles.
10. Tell whose bag of nut mix has the
greater ratio of peanuts to total nuts.
Dina
Don
Almonds
6
11
Cashews
8
7
Peanuts
10
18
PRACTICE AND PROBLEM SOLVING
Extra Practice
See page 735.
Use the table for Exercises 11–13.
11. Tell whether group
1 or group 2 has the
greater ratio of the
number of people
for an open-campus
lunch to the number of
people with no opinion.
Opinions on Open-Campus Lunch
Group 1
Group 2
Group 3
For
9
10
12
Against
14
16
16
No Opinion
5
6
8
12. Which group has the least ratio of the number of people against an
open-campus lunch to the total number of survey responses?
13. Estimation For each group, is the ratio of the number of people for an opencampus lunch to the number of people against it less than or greater than !12!?
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Chapter 5 Proportional Relationships