3.92% is the change from 638 to 663
Calculation steps:
[( 663 - 638 ) ÷ 638] x 100 = 3.92%
Formula
Percentage change = [(663 - 638) / 638] x 100
Subtract the new number by the original number
663 - 638 = 25
25 ÷ 638 = 0.03918495297805643
0.03918495297805643 x 100 = 3.92%