-6.22% is the change from 643 to 603
Calculation steps:
[( 603 - 643 ) ÷ 643] x 100 = -6.22%
Formula
Percentage change = [(603 - 643) / 643] x 100
Subtract the new number by the original number
603 - 643 = -40
-40 ÷ 643 = -0.06220839813374806
-0.06220839813374806 x 100 = -6.22%