500% is the change from 85 to 510
Calculation steps:
[( 510 - 85 ) ÷ 85] x 100 = 500%
Formula
Percentage change = [(510 - 85) / 85] x 100
Subtract the new number by the original number
510 - 85 = 425
425 ÷ 85 = 5
5 x 100 = 500%
Example