2.04% is the change from 638 to 651
Calculation steps:
[( 651 - 638 ) ÷ 638] x 100 = 2.04%
Formula
Percentage change = [(651 - 638) / 638] x 100
Subtract the new number by the original number
651 - 638 = 13
13 ÷ 638 = 0.02037617554858934
0.02037617554858934 x 100 = 2.04%