14.81% is the change from 270 to 310
Calculation steps:
[( 310 - 270 ) ÷ 270] x 100 = 14.81%
Formula
Percentage change = [(310 - 270) / 270] x 100
Subtract the new number by the original number
310 - 270 = 40
40 ÷ 270 = 0.14814814814814814
0.14814814814814814 x 100 = 14.81%