507.23% is the change from 83 to 504
Calculation steps:
[( 504 - 83 ) ÷ 83] x 100 = 507.23%
Formula
Percentage change = [(504 - 83) / 83] x 100
Subtract the new number by the original number
504 - 83 = 421
421 ÷ 83 = 5.072289156626506
5.072289156626506 x 100 = 507.23%