-31.48% is the change from 915 to 627
Calculation steps:
[( 627 - 915 ) ÷ 915] x 100 = -31.48%
Formula
Percentage change = [(627 - 915) / 915] x 100
Subtract the new number by the original number
627 - 915 = -288
-288 ÷ 915 = -0.31475409836065577
-0.31475409836065577 x 100 = -31.48%