3.38% is the change from 622 to 643
Calculation steps:
[( 643 - 622 ) ÷ 622] x 100 = 3.38%
Formula
Percentage change = [(643 - 622) / 622] x 100
Subtract the new number by the original number
643 - 622 = 21
21 ÷ 622 = 0.03376205787781351
0.03376205787781351 x 100 = 3.38%