31.3% is the change from 230 to 302
Calculation steps:
[( 302 - 230 ) ÷ 230] x 100 = 31.3%
Formula
Percentage change = [(302 - 230) / 230] x 100
Subtract the new number by the original number
302 - 230 = 72
72 ÷ 230 = 0.3130434782608696
0.3130434782608696 x 100 = 31.3%