3.57% is the change from 616 to 638
Calculation steps:
[( 638 - 616 ) ÷ 616] x 100 = 3.57%
Formula
Percentage change = [(638 - 616) / 616] x 100
Subtract the new number by the original number
638 - 616 = 22
22 ÷ 616 = 0.03571428571428571
0.03571428571428571 x 100 = 3.57%