Question

Austin currently runs 25 miles per week. A year ago he ran 20 miles per week. By what percentage has Austin increased his running?

Answer 1

`25%`

Explanation:

Austen has increased his running by
`color(white)("XXX")25-20= 5` miles per week.

This question basically asks what percentage of the number of miles Austin was running does this increase of `5` miles represent.

`x% " of " 20 " miles per week" = 5 " miles per week"`

`x/100 xx 20 =5`

`x/cancel(100)_5 xx cancel(20) = 5`

`x= 5 xx 5 = 25`