-88.22% is the change from 645 to 76
Calculation steps:
[( 76 - 645 ) ÷ 645] x 100 = -88.22%
Formula
Percentage change = [(76 - 645) / 645] x 100
Subtract the new number by the original number
76 - 645 = -569
-569 ÷ 645 = -0.8821705426356589
-0.8821705426356589 x 100 = -88.22%