6.63% is the change from 603 to 643
Calculation steps:
[( 643 - 603 ) ÷ 603] x 100 = 6.63%
Formula
Percentage change = [(643 - 603) / 603] x 100
Subtract the new number by the original number
643 - 603 = 40
40 ÷ 603 = 0.06633499170812604
0.06633499170812604 x 100 = 6.63%