522.22% is the change from 81 to 504
Calculation steps:
[( 504 - 81 ) ÷ 81] x 100 = 522.22%
Formula
Percentage change = [(504 - 81) / 81] x 100
Subtract the new number by the original number
504 - 81 = 423
423 ÷ 81 = 5.222222222222222
5.222222222222222 x 100 = 522.22%