-22.93% is the change from 820 to 632
Calculation steps:
[( 632 - 820 ) ÷ 820] x 100 = -22.93%
Formula
Percentage change = [(632 - 820) / 820] x 100
Subtract the new number by the original number
632 - 820 = -188
-188 ÷ 820 = -0.22926829268292684
-0.22926829268292684 x 100 = -22.93%