Download Study Guide on ratios and equal ratios.

Name
Class
Date
Reteaching 5-1
Ratios
A ratio is a comparison of two numbers by division.
You can write a ratio three ways.
Compare the number of red tulips to the
number of yellow tulips.
red
tulips
yellow
tulips
orange
mums
white
mums
6 to 2, 6 : 2, or 62
To find equal ratios, multiply or divide
each part of the ratio by the same
6 5 6 3 2 5 12
2
232
4
d Multiply by 2.
6564253
2
242
1
d Divide by 2.
nonzero number.
The ratio 31 is in simplest form.
Use the drawings at the top of the page. Write each ratio in
three ways.
1. yellow tulips to red tulips
2. white mums to orange mums
3 to 5; 3 : 5; 3
5
2 to 6; 2 : 6; 2
6
3. red tulips to orange mums
4. yellow tulips to white mums
2 to 3; 2 : 3; 2
3
6 to 5; 6 : 5; 6
5
6. orange mums to all flowers
6
6 to 16; 6 : 16; 16
5
5 to 16; 5 : 16; 16
7. tulips to mums
8. white mums to tulips
3 to 8; 3 : 8; 3
8
8 to 8; 8 : 8; 8
8
9. yellow tulips to all flowers
10. yellow tulips to orange mums
2
2 to 16; 2 : 16; 16
2 to 5; 2 : 5; 2
5
Write two ratios equal to the given ratio.
5
11. 10
1 10
2; 20
12. 2:5
Sample answers are shown.
4 : 10; 6 : 15
13. 18 to 30
3 to 5; 36 to 60
Write each ratio in simplest form.
8
14. 16
17. 48
24
8
1
2
2
1
15. 8 to 2
6
18. 100
Lesson 5-1 Reteaching
4 to 1
3
50
16. 10 : 15
19. 8 : 18
2:3
4:9
Course 2 Chapter 5
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5. red tulips to all flowers