611.11% is the change from 81 to 576
Calculation steps:
[( 576 - 81 ) ÷ 81] x 100 = 611.11%
Formula
Percentage change = [(576 - 81) / 81] x 100
Subtract the new number by the original number
576 - 81 = 495
495 ÷ 81 = 6.111111111111111
6.111111111111111 x 100 = 611.11%