-85.46% is the change from 571 to 83
Calculation steps:
[( 83 - 571 ) ÷ 571] x 100 = -85.46%
Formula
Percentage change = [(83 - 571) / 571] x 100
Subtract the new number by the original number
83 - 571 = -488
-488 ÷ 571 = -0.8546409807355516
-0.8546409807355516 x 100 = -85.46%