-16.23% is the change from 764 to 640
Calculation steps:
[( 640 - 764 ) ÷ 764] x 100 = -16.23%
Formula
Percentage change = [(640 - 764) / 764] x 100
Subtract the new number by the original number
640 - 764 = -124
-124 ÷ 764 = -0.16230366492146597
-0.16230366492146597 x 100 = -16.23%