23.74% is the change from 278 to 344
Calculation steps:
[( 344 - 278 ) ÷ 278] x 100 = 23.74%
Formula
Percentage change = [(344 - 278) / 278] x 100
Subtract the new number by the original number
344 - 278 = 66
66 ÷ 278 = 0.23741007194244604
0.23741007194244604 x 100 = 23.74%