524.69% is the change from 81 to 506
Calculation steps:
[( 506 - 81 ) ÷ 81] x 100 = 524.69%
Formula
Percentage change = [(506 - 81) / 81] x 100
Subtract the new number by the original number
506 - 81 = 425
425 ÷ 81 = 5.246913580246914
5.246913580246914 x 100 = 524.69%