0.78% is the change from 638 to 643
Calculation steps:
[( 643 - 638 ) ÷ 638] x 100 = 0.78%
Formula
Percentage change = [(643 - 638) / 638] x 100
Subtract the new number by the original number
643 - 638 = 5
5 ÷ 638 = 0.007836990595611285
0.007836990595611285 x 100 = 0.78%