-96.39% is the change from 582 to 21
Calculation steps:
[( 21 - 582 ) ÷ 582] x 100 = -96.39%
Formula
Percentage change = [(21 - 582) / 582] x 100
Subtract the new number by the original number
21 - 582 = -561
-561 ÷ 582 = -0.9639175257731959
-0.9639175257731959 x 100 = -96.39%