28.1% is the change from 242 to 310
Calculation steps:
[( 310 - 242 ) ÷ 242] x 100 = 28.1%
Formula
Percentage change = [(310 - 242) / 242] x 100
Subtract the new number by the original number
310 - 242 = 68
68 ÷ 242 = 0.2809917355371901
0.2809917355371901 x 100 = 28.1%