319.83% is the change from 121 to 508
Calculation steps:
[( 508 - 121 ) ÷ 121] x 100 = 319.83%
Formula
Percentage change = [(508 - 121) / 121] x 100
Subtract the new number by the original number
508 - 121 = 387
387 ÷ 121 = 3.1983471074380163
3.1983471074380163 x 100 = 319.83%