-21.53% is the change from 836 to 656
Calculation steps:
[( 656 - 836 ) ÷ 836] x 100 = -21.53%
Formula
Percentage change = [(656 - 836) / 836] x 100
Subtract the new number by the original number
656 - 836 = -180
-180 ÷ 836 = -0.215311004784689
-0.215311004784689 x 100 = -21.53%