4.58% is the change from 611 to 639
Calculation steps:
[( 639 - 611 ) ÷ 611] x 100 = 4.58%
Formula
Percentage change = [(639 - 611) / 611] x 100
Subtract the new number by the original number
639 - 611 = 28
28 ÷ 611 = 0.04582651391162029
0.04582651391162029 x 100 = 4.58%