3.07% is the change from 391 to 403
Calculation steps:
[( 403 - 391 ) ÷ 391] x 100 = 3.07%
Formula
Percentage change = [(403 - 391) / 391] x 100
Subtract the new number by the original number
403 - 391 = 12
12 ÷ 391 = 0.030690537084398978
0.030690537084398978 x 100 = 3.07%