Exercise 18 Page 15

A rate is a special type of ratio that compares quantities with different kinds of units. A unit rate is a rate that has been reduced to have a denominator of 1 unit. We are given the following rate. $ 1.12in 8.2ounces Let's write this rate as a fraction. $ 1.12/8.2ounces To find the unit rate, we need to write an equivalent rate with a denominator of 1 ounce. Let's ignore the units for simplicity.

1.12/8.2

ReduceFrac

a/b=.a / 8.2./.b / 8.2.

1.12/ 8.2/8.2/ 8.2

UseCalc

Use a calculator

0.136585.../8.2/8.2

RoundDec

Round to 2 decimal place(s)

0.14/8.2/8.2

QuotOne

a/a=1

0.14/1

Finally, we got the unit rate. $ 1.12/8.2ounces ≈ $ 0.14/1ounce The unit rate is about $ 0.14 per ounce.