-81.57% is the change from 971 to 179
Calculation steps:
[( 179 - 971 ) ÷ 971] x 100 = -81.57%
Formula
Percentage change = [(179 - 971) / 971] x 100
Subtract the new number by the original number
179 - 971 = -792
-792 ÷ 971 = -0.815653964984552
-0.815653964984552 x 100 = -81.57%