12.79% is the change from 305 to 344
Calculation steps:
[( 344 - 305 ) ÷ 305] x 100 = 12.79%
Formula
Percentage change = [(344 - 305) / 305] x 100
Subtract the new number by the original number
344 - 305 = 39
39 ÷ 305 = 0.12786885245901639
0.12786885245901639 x 100 = 12.79%