30.9% is the change from 233 to 305
Calculation steps:
[( 305 - 233 ) ÷ 233] x 100 = 30.9%
Formula
Percentage change = [(305 - 233) / 233] x 100
Subtract the new number by the original number
305 - 233 = 72
72 ÷ 233 = 0.3090128755364807
0.3090128755364807 x 100 = 30.9%