3.1% is the change from 903 to 931
Calculation steps:
[( 931 - 903 ) ÷ 903] x 100 = 3.1%
Formula
Percentage change = [(931 - 903) / 903] x 100
Subtract the new number by the original number
931 - 903 = 28
28 ÷ 903 = 0.031007751937984496
0.031007751937984496 x 100 = 3.1%