Question

Yesterday, Jack drove 39 1/2 miles. He used 1 1/4

gallons of gasoline. What is the unit rate for miles per gallon?

Answer 1

31
`(3)/(5)` miles per gallon.

Explanation:

`(39(1)/(2) )/(1(1)/(4) )`

39
`(1)/(2)` ÷ 1
`(1)/(4)`

`(79)/(2)` ÷
`(5)/(4)`

`(79)/(2)` x
`(4)/(5)` =
`(158)/(5)` = 31
`(3)/(5)` miles per gallon or 31.6 miles per gallon