-90% is the change from 580 to 58
Calculation steps:
[( 58 - 580 ) ÷ 580] x 100 = -90%
Formula
Percentage change = [(58 - 580) / 580] x 100
Subtract the new number by the original number
58 - 580 = -522
-522 ÷ 580 = -0.9
-0.9 x 100 = -90%
Example