Question

mary decreased her time in the mile walk from 30 minutes to 24 minutes. What was the percent of decrease?

Answer 1

(24/30)*100 = 80%

Therefore she decreased from 100% to 80%, which is about 20% decrease.
Thus, the answer is 20%



Another way to do this is.


`((Original value - current value))/(Original value) * 100% = percentage of change in value`


Which in this case is

`(30-24)/(30) * 100% = 20%`