-83.7% is the change from 871 to 142
Calculation steps:
[( 142 - 871 ) ÷ 871] x 100 = -83.7%
Formula
Percentage change = [(142 - 871) / 871] x 100
Subtract the new number by the original number
142 - 871 = -729
-729 ÷ 871 = -0.8369690011481056
-0.8369690011481056 x 100 = -83.7%