308.87% is the change from 124 to 507
Calculation steps:
[( 507 - 124 ) ÷ 124] x 100 = 308.87%
Formula
Percentage change = [(507 - 124) / 124] x 100
Subtract the new number by the original number
507 - 124 = 383
383 ÷ 124 = 3.088709677419355
3.088709677419355 x 100 = 308.87%