30.21% is the change from 235 to 306
Calculation steps:
[( 306 - 235 ) ÷ 235] x 100 = 30.21%
Formula
Percentage change = [(306 - 235) / 235] x 100
Subtract the new number by the original number
306 - 235 = 71
71 ÷ 235 = 0.3021276595744681
0.3021276595744681 x 100 = 30.21%