-91.55% is the change from 580 to 49
Calculation steps:
[( 49 - 580 ) ÷ 580] x 100 = -91.55%
Formula
Percentage change = [(49 - 580) / 580] x 100
Subtract the new number by the original number
49 - 580 = -531
-531 ÷ 580 = -0.9155172413793103
-0.9155172413793103 x 100 = -91.55%