35.37% is the change from 229 to 310
Calculation steps:
[( 310 - 229 ) ÷ 229] x 100 = 35.37%
Formula
Percentage change = [(310 - 229) / 229] x 100
Subtract the new number by the original number
310 - 229 = 81
81 ÷ 229 = 0.3537117903930131
0.3537117903930131 x 100 = 35.37%