4.76% is the change from 609 to 638
Calculation steps:
[( 638 - 609 ) ÷ 609] x 100 = 4.76%
Formula
Percentage change = [(638 - 609) / 609] x 100
Subtract the new number by the original number
638 - 609 = 29
29 ÷ 609 = 0.047619047619047616
0.047619047619047616 x 100 = 4.76%