31.6% is the change from 307 to 404
Calculation steps:
[( 404 - 307 ) ÷ 307] x 100 = 31.6%
Formula
Percentage change = [(404 - 307) / 307] x 100
Subtract the new number by the original number
404 - 307 = 97
97 ÷ 307 = 0.31596091205211724
0.31596091205211724 x 100 = 31.6%