6.8% is the change from 603 to 644
Calculation steps:
[( 644 - 603 ) ÷ 603] x 100 = 6.8%
Formula
Percentage change = [(644 - 603) / 603] x 100
Subtract the new number by the original number
644 - 603 = 41
41 ÷ 603 = 0.06799336650082918
0.06799336650082918 x 100 = 6.8%