27.36% is the change from 307 to 391
Calculation steps:
[( 391 - 307 ) ÷ 307] x 100 = 27.36%
Formula
Percentage change = [(391 - 307) / 307] x 100
Subtract the new number by the original number
391 - 307 = 84
84 ÷ 307 = 0.2736156351791531
0.2736156351791531 x 100 = 27.36%