43.88% is the change from 278 to 400
Calculation steps:
[( 400 - 278 ) ÷ 278] x 100 = 43.88%
Formula
Percentage change = [(400 - 278) / 278] x 100
Subtract the new number by the original number
400 - 278 = 122
122 ÷ 278 = 0.43884892086330934
0.43884892086330934 x 100 = 43.88%