3 years ago

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

1 answer:

3 0

(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.

$\frac{(Original value - current value)}{Original value} * 100% = percentage of change in value$

Which in this case is
$\frac{30-24}{30} * 100% = 20%$

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