-84.54% is the change from 582 to 90
Calculation steps:
[( 90 - 582 ) ÷ 582] x 100 = -84.54%
Formula
Percentage change = [(90 - 582) / 582] x 100
Subtract the new number by the original number
90 - 582 = -492
-492 ÷ 582 = -0.845360824742268
-0.845360824742268 x 100 = -84.54%