517.28% is the change from 81 to 500
Calculation steps:
[( 500 - 81 ) ÷ 81] x 100 = 517.28%
Formula
Percentage change = [(500 - 81) / 81] x 100
Subtract the new number by the original number
500 - 81 = 419
419 ÷ 81 = 5.172839506172839
5.172839506172839 x 100 = 517.28%