-84.39% is the change from 871 to 136
Calculation steps:
[( 136 - 871 ) ÷ 871] x 100 = -84.39%
Formula
Percentage change = [(136 - 871) / 871] x 100
Subtract the new number by the original number
136 - 871 = -735
-735 ÷ 871 = -0.8438576349024111
-0.8438576349024111 x 100 = -84.39%