-85.2% is the change from 581 to 86
Calculation steps:
[( 86 - 581 ) ÷ 581] x 100 = -85.2%
Formula
Percentage change = [(86 - 581) / 581] x 100
Subtract the new number by the original number
86 - 581 = -495
-495 ÷ 581 = -0.8519793459552496
-0.8519793459552496 x 100 = -85.2%