-84.39% is the change from 583 to 91
Calculation steps:
[( 91 - 583 ) ÷ 583] x 100 = -84.39%
Formula
Percentage change = [(91 - 583) / 583] x 100
Subtract the new number by the original number
91 - 583 = -492
-492 ÷ 583 = -0.8439108061749572
-0.8439108061749572 x 100 = -84.39%