-82.2% is the change from 871 to 155
Calculation steps:
[( 155 - 871 ) ÷ 871] x 100 = -82.2%
Formula
Percentage change = [(155 - 871) / 871] x 100
Subtract the new number by the original number
155 - 871 = -716
-716 ÷ 871 = -0.8220436280137773
-0.8220436280137773 x 100 = -82.2%