-80.25% is the change from 871 to 172
Calculation steps:
[( 172 - 871 ) ÷ 871] x 100 = -80.25%
Formula
Percentage change = [(172 - 871) / 871] x 100
Subtract the new number by the original number
172 - 871 = -699
-699 ÷ 871 = -0.8025258323765786
-0.8025258323765786 x 100 = -80.25%