33.19% is the change from 232 to 309
Calculation steps:
[( 309 - 232 ) ÷ 232] x 100 = 33.19%
Formula
Percentage change = [(309 - 232) / 232] x 100
Subtract the new number by the original number
309 - 232 = 77
77 ÷ 232 = 0.33189655172413796
0.33189655172413796 x 100 = 33.19%