6.47% is the change from 603 to 642
Calculation steps:
[( 642 - 603 ) ÷ 603] x 100 = 6.47%
Formula
Percentage change = [(642 - 603) / 603] x 100
Subtract the new number by the original number
642 - 603 = 39
39 ÷ 603 = 0.06467661691542288
0.06467661691542288 x 100 = 6.47%