40.29% is the change from 278 to 390
Calculation steps:
[( 390 - 278 ) ÷ 278] x 100 = 40.29%
Formula
Percentage change = [(390 - 278) / 278] x 100
Subtract the new number by the original number
390 - 278 = 112
112 ÷ 278 = 0.4028776978417266
0.4028776978417266 x 100 = 40.29%