513.25% is the change from 83 to 509
Calculation steps:
[( 509 - 83 ) ÷ 83] x 100 = 513.25%
Formula
Percentage change = [(509 - 83) / 83] x 100
Subtract the new number by the original number
509 - 83 = 426
426 ÷ 83 = 5.132530120481928
5.132530120481928 x 100 = 513.25%