300% is the change from 124 to 496
Calculation steps:
[( 496 - 124 ) ÷ 124] x 100 = 300%
Formula
Percentage change = [(496 - 124) / 124] x 100
Subtract the new number by the original number
496 - 124 = 372
372 ÷ 124 = 3
3 x 100 = 300%
Example