31.17% is the change from 308 to 404
Calculation steps:
[( 404 - 308 ) ÷ 308] x 100 = 31.17%
Formula
Percentage change = [(404 - 308) / 308] x 100
Subtract the new number by the original number
404 - 308 = 96
96 ÷ 308 = 0.3116883116883117
0.3116883116883117 x 100 = 31.17%