-81.55% is the change from 656 to 121
Calculation steps:
[( 121 - 656 ) ÷ 656] x 100 = -81.55%
Formula
Percentage change = [(121 - 656) / 656] x 100
Subtract the new number by the original number
121 - 656 = -535
-535 ÷ 656 = -0.8155487804878049
-0.8155487804878049 x 100 = -81.55%