617.28% is the change from 81 to 581
Calculation steps:
[( 581 - 81 ) ÷ 81] x 100 = 617.28%
Formula
Percentage change = [(581 - 81) / 81] x 100
Subtract the new number by the original number
581 - 81 = 500
500 ÷ 81 = 6.172839506172839
6.172839506172839 x 100 = 617.28%