-87.96% is the change from 656 to 79
Calculation steps:
[( 79 - 656 ) ÷ 656] x 100 = -87.96%
Formula
Percentage change = [(79 - 656) / 656] x 100
Subtract the new number by the original number
79 - 656 = -577
-577 ÷ 656 = -0.8795731707317073
-0.8795731707317073 x 100 = -87.96%