-85.71% is the change from 581 to 83
Calculation steps:
[( 83 - 581 ) ÷ 581] x 100 = -85.71%
Formula
Percentage change = [(83 - 581) / 581] x 100
Subtract the new number by the original number
83 - 581 = -498
-498 ÷ 581 = -0.8571428571428571
-0.8571428571428571 x 100 = -85.71%