2.57% is the change from 622 to 638
Calculation steps:
[( 638 - 622 ) ÷ 622] x 100 = 2.57%
Formula
Percentage change = [(638 - 622) / 622] x 100
Subtract the new number by the original number
638 - 622 = 16
16 ÷ 622 = 0.02572347266881029
0.02572347266881029 x 100 = 2.57%