2.24% is the change from 624 to 638
Calculation steps:
[( 638 - 624 ) ÷ 624] x 100 = 2.24%
Formula
Percentage change = [(638 - 624) / 624] x 100
Subtract the new number by the original number
638 - 624 = 14
14 ÷ 624 = 0.022435897435897436
0.022435897435897436 x 100 = 2.24%