30.25% is the change from 238 to 310
Calculation steps:
[( 310 - 238 ) ÷ 238] x 100 = 30.25%
Formula
Percentage change = [(310 - 238) / 238] x 100
Subtract the new number by the original number
310 - 238 = 72
72 ÷ 238 = 0.3025210084033613
0.3025210084033613 x 100 = 30.25%