509.64% is the change from 83 to 506
Calculation steps:
[( 506 - 83 ) ÷ 83] x 100 = 509.64%
Formula
Percentage change = [(506 - 83) / 83] x 100
Subtract the new number by the original number
506 - 83 = 423
423 ÷ 83 = 5.096385542168675
5.096385542168675 x 100 = 509.64%