Page 181 - Math Course 1 (Book 1)

Converting Ratios to Fractions

Compare Units Rates 30 ft 12 in 60 min The reciprocal of

2 hr • 1ft • 1 hr 60 min is 1 hr
Example 3 1 hr 60 min
1 6
30 ft 12 in 1 hr Divide the common
SHOPPING 2 hr • 1ft • 60 min factors and units.
A 12-oz bottle of cleaner costs 1 2
$4.50. A 16-oz bottle of cleaner 1
costs $6.56. Which costs less per
ounce? = 3 in. Simplify.
1 min
Find and compare the unit rates of the bottles.
÷ 12 Answer 30 feet in 2 hours is equivalent
to 3 inches per minute.
$ 4.50 = $0.38 Divide the numerator
12 ounces 1 ounces and denominator by 12
to get a denominator
÷ 12 of 1. Your Turn!

For the 12-oz bottle, the unit rate is $0.38 per ounce.
Write Ratios in Simplest Form
÷ 16
Express the ratio 8 golden retrievers out of 12
$ 6.56 = $0.41 Divide the numerator dogs as a fraction in simplest form.
16 ounces 1 ounces and denominator by 16 3
to get a denominator A. 2
÷ 16 of 1. B. 4
For the 16-oz bottle, the unit rate is $0.41 per ounce. 6
C. 8
12
The 12-oz bottle has the lower
Answer D. 2
cost per ounce. 3

Answer

Convert Rates

Example Write Ratios as Fractions

Express the ratio 4 feet to 18 inches as a fraction
ANIMALS in simplest form.
A snail moved 30 feet in 2 hours. How many inches 2
per minute did the snail move? A. 9

30 ft in. B. 8
You will need to convert to 3
2 hr 1 min
C. 48
There are 12 inches in 1 foot and 60 minutes in 1 18
hour. D. 24
30 ft 9
Write 30 feet in 2 hours as
2 hr
30 ft = 30 ft • 12 in ÷ 60 min Answer
2 hr 2 hr 1ft 1 hr
Convert feet to inches and hours to minutes.

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