-81.75% is the change from 871 to 159
Calculation steps:
[( 159 - 871 ) ÷ 871] x 100 = -81.75%
Formula
Percentage change = [(159 - 871) / 871] x 100
Subtract the new number by the original number
159 - 871 = -712
-712 ÷ 871 = -0.817451205510907
-0.817451205510907 x 100 = -81.75%