4.25% is the change from 612 to 638
Calculation steps:
[( 638 - 612 ) ÷ 612] x 100 = 4.25%
Formula
Percentage change = [(638 - 612) / 612] x 100
Subtract the new number by the original number
638 - 612 = 26
26 ÷ 612 = 0.042483660130718956
0.042483660130718956 x 100 = 4.25%