-72.68% is the change from 915 to 250
Calculation steps:
[( 250 - 915 ) ÷ 915] x 100 = -72.68%
Formula
Percentage change = [(250 - 915) / 915] x 100
Subtract the new number by the original number
250 - 915 = -665
-665 ÷ 915 = -0.726775956284153
-0.726775956284153 x 100 = -72.68%