32.05% is the change from 234 to 309
Calculation steps:
[( 309 - 234 ) ÷ 234] x 100 = 32.05%
Formula
Percentage change = [(309 - 234) / 234] x 100
Subtract the new number by the original number
309 - 234 = 75
75 ÷ 234 = 0.32051282051282054
0.32051282051282054 x 100 = 32.05%