13.55% is the change from 273 to 310
Calculation steps:
[( 310 - 273 ) ÷ 273] x 100 = 13.55%
Formula
Percentage change = [(310 - 273) / 273] x 100
Subtract the new number by the original number
310 - 273 = 37
37 ÷ 273 = 0.13553113553113552
0.13553113553113552 x 100 = 13.55%