-80.19% is the change from 863 to 171
Calculation steps:
[( 171 - 863 ) ÷ 863] x 100 = -80.19%
Formula
Percentage change = [(171 - 863) / 863] x 100
Subtract the new number by the original number
171 - 863 = -692
-692 ÷ 863 = -0.8018539976825029
-0.8018539976825029 x 100 = -80.19%