-81.26% is the change from 870 to 163
Calculation steps:
[( 163 - 870 ) ÷ 870] x 100 = -81.26%
Formula
Percentage change = [(163 - 870) / 870] x 100
Subtract the new number by the original number
163 - 870 = -707
-707 ÷ 870 = -0.8126436781609195
-0.8126436781609195 x 100 = -81.26%