-24.6% is the change from 870 to 656
Calculation steps:
[( 656 - 870 ) ÷ 870] x 100 = -24.6%
Formula
Percentage change = [(656 - 870) / 870] x 100
Subtract the new number by the original number
656 - 870 = -214
-214 ÷ 870 = -0.24597701149425288
-0.24597701149425288 x 100 = -24.6%