40.65% is the change from 278 to 391
Calculation steps:
[( 391 - 278 ) ÷ 278] x 100 = 40.65%
Formula
Percentage change = [(391 - 278) / 278] x 100
Subtract the new number by the original number
391 - 278 = 113
113 ÷ 278 = 0.4064748201438849
0.4064748201438849 x 100 = 40.65%