535.8% is the change from 81 to 515
Calculation steps:
[( 515 - 81 ) ÷ 81] x 100 = 535.8%
Formula
Percentage change = [(515 - 81) / 81] x 100
Subtract the new number by the original number
515 - 81 = 434
434 ÷ 81 = 5.3580246913580245
5.3580246913580245 x 100 = 535.8%