-97.42% is the change from 582 to 15
Calculation steps:
[( 15 - 582 ) ÷ 582] x 100 = -97.42%
Formula
Percentage change = [(15 - 582) / 582] x 100
Subtract the new number by the original number
15 - 582 = -567
-567 ÷ 582 = -0.9742268041237113
-0.9742268041237113 x 100 = -97.42%