-83.12% is the change from 871 to 147
Calculation steps:
[( 147 - 871 ) ÷ 871] x 100 = -83.12%
Formula
Percentage change = [(147 - 871) / 871] x 100
Subtract the new number by the original number
147 - 871 = -724
-724 ÷ 871 = -0.8312284730195177
-0.8312284730195177 x 100 = -83.12%