-80.94% is the change from 871 to 166
Calculation steps:
[( 166 - 871 ) ÷ 871] x 100 = -80.94%
Formula
Percentage change = [(166 - 871) / 871] x 100
Subtract the new number by the original number
166 - 871 = -705
-705 ÷ 871 = -0.8094144661308841
-0.8094144661308841 x 100 = -80.94%