-82.09% is the change from 871 to 156
Calculation steps:
[( 156 - 871 ) ÷ 871] x 100 = -82.09%
Formula
Percentage change = [(156 - 871) / 871] x 100
Subtract the new number by the original number
156 - 871 = -715
-715 ÷ 871 = -0.8208955223880597
-0.8208955223880597 x 100 = -82.09%