6.43% is the change from 638 to 679
Calculation steps:
[( 679 - 638 ) ÷ 638] x 100 = 6.43%
Formula
Percentage change = [(679 - 638) / 638] x 100
Subtract the new number by the original number
679 - 638 = 41
41 ÷ 638 = 0.06426332288401254
0.06426332288401254 x 100 = 6.43%