-85.81% is the change from 571 to 81
Calculation steps:
[( 81 - 571 ) ÷ 571] x 100 = -85.81%
Formula
Percentage change = [(81 - 571) / 571] x 100
Subtract the new number by the original number
81 - 571 = -490
-490 ÷ 571 = -0.8581436077057794
-0.8581436077057794 x 100 = -85.81%