319.35% is the change from 124 to 520
Calculation steps:
[( 520 - 124 ) ÷ 124] x 100 = 319.35%
Formula
Percentage change = [(520 - 124) / 124] x 100
Subtract the new number by the original number
520 - 124 = 396
396 ÷ 124 = 3.193548387096774
3.193548387096774 x 100 = 319.35%