-90.69% is the change from 580 to 54
Calculation steps:
[( 54 - 580 ) ÷ 580] x 100 = -90.69%
Formula
Percentage change = [(54 - 580) / 580] x 100
Subtract the new number by the original number
54 - 580 = -526
-526 ÷ 580 = -0.906896551724138
-0.906896551724138 x 100 = -90.69%