3.69% is the change from 623 to 646
Calculation steps:
[( 646 - 623 ) ÷ 623] x 100 = 3.69%
Formula
Percentage change = [(646 - 623) / 623] x 100
Subtract the new number by the original number
646 - 623 = 23
23 ÷ 623 = 0.03691813804173355
0.03691813804173355 x 100 = 3.69%