408% is the change from 100 to 508
Calculation steps:
[( 508 - 100 ) ÷ 100] x 100 = 408%
Formula
Percentage change = [(508 - 100) / 100] x 100
Subtract the new number by the original number
508 - 100 = 408
408 ÷ 100 = 4.08
4.08 x 100 = 408%
Example