39.02% is the change from 305 to 424
Calculation steps:
[( 424 - 305 ) ÷ 305] x 100 = 39.02%
Formula
Percentage change = [(424 - 305) / 305] x 100
Subtract the new number by the original number
424 - 305 = 119
119 ÷ 305 = 0.3901639344262295
0.3901639344262295 x 100 = 39.02%