Question

Find percentage of change. Round to the nearest whole number if necessary. State whether the percent of change is an increase or decrease.

Answer 1

13:

Going from 40 to 25 is a decrease of 15. Comparing that 15 to the starting amount of 40, we have a decrease of
`(15)/(40)` or 0.375 or 37.5%. Since you need to round to the nearest whole number, that'd be a decrease of about 38%.

14.

Going from 120 to 140 is an increase of 20. Comparing that 20 to the starting amount of 120, we have an increase of
`(20)/(120)` or about 0.1667 or about 16.67%. Since you need to round to the nearest whole number, that'd be an increase of about 17%.

You always divide the amount of change by the starting value, not the ending value.