618.52% is the change from 81 to 582
Calculation steps:
[( 582 - 81 ) ÷ 81] x 100 = 618.52%
Formula
Percentage change = [(582 - 81) / 81] x 100
Subtract the new number by the original number
582 - 81 = 501
501 ÷ 81 = 6.185185185185185
6.185185185185185 x 100 = 618.52%