32.91% is the change from 234 to 311
Calculation steps:
[( 311 - 234 ) ÷ 234] x 100 = 32.91%
Formula
Percentage change = [(311 - 234) / 234] x 100
Subtract the new number by the original number
311 - 234 = 77
77 ÷ 234 = 0.32905982905982906
0.32905982905982906 x 100 = 32.91%