-85.99% is the change from 571 to 80
Calculation steps:
[( 80 - 571 ) ÷ 571] x 100 = -85.99%
Formula
Percentage change = [(80 - 571) / 571] x 100
Subtract the new number by the original number
80 - 571 = -491
-491 ÷ 571 = -0.8598949211908932
-0.8598949211908932 x 100 = -85.99%