307.32% is the change from 123 to 501
Calculation steps:
[( 501 - 123 ) ÷ 123] x 100 = 307.32%
Formula
Percentage change = [(501 - 123) / 123] x 100
Subtract the new number by the original number
501 - 123 = 378
378 ÷ 123 = 3.073170731707317
3.073170731707317 x 100 = 307.32%