Ratios And Rates Worksheet - Chapter 3 Page 7
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38Example 2
Creating equivalent ratios using fractions
Misa has chat room buddies from Canada and the U.S.A. in a ratio of 30 : 20.
She has 135 Canadian buddies. How many U.S. buddies does she have?
Allison’s Solution
3
0
I wrote the ratio as a fraction.
30 : 20 =
2
0
÷ 10
3
0
I renamed
in lower terms by dividing the numerator and
2
0
30
3
=
denominator by the common factor of 10.
20
2
÷ 10
I wrote a proportion comparing Canadian buddies to
Can
a
d
i
a
n
b
u
d
dies
3
=
U
.S
.
b
u
d
d
ie
s
2
U.S. buddies.
1
35
=
■
I divided 135 by 3 to figure out what to multiply 2 by.
135 ÷ 3 = 45
x 45
3
135
=
2
90
x 45
Misa has 90 U.S. buddies.
108
Chapter 3
NEL
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