42.12% is the change from 273 to 388
Calculation steps:
[( 388 - 273 ) ÷ 273] x 100 = 42.12%
Formula
Percentage change = [(388 - 273) / 273] x 100
Subtract the new number by the original number
388 - 273 = 115
115 ÷ 273 = 0.42124542124542125
0.42124542124542125 x 100 = 42.12%