-15.57% is the change from 758 to 640
Calculation steps:
[( 640 - 758 ) ÷ 758] x 100 = -15.57%
Formula
Percentage change = [(640 - 758) / 758] x 100
Subtract the new number by the original number
640 - 758 = -118
-118 ÷ 758 = -0.15567282321899736
-0.15567282321899736 x 100 = -15.57%