34.74% is the change from 308 to 415
Calculation steps:
[( 415 - 308 ) ÷ 308] x 100 = 34.74%
Formula
Percentage change = [(415 - 308) / 308] x 100
Subtract the new number by the original number
415 - 308 = 107
107 ÷ 308 = 0.3474025974025974
0.3474025974025974 x 100 = 34.74%