-86.13% is the change from 584 to 81
Calculation steps:
[( 81 - 584 ) ÷ 584] x 100 = -86.13%
Formula
Percentage change = [(81 - 584) / 584] x 100
Subtract the new number by the original number
81 - 584 = -503
-503 ÷ 584 = -0.8613013698630136
-0.8613013698630136 x 100 = -86.13%