5.42% is the change from 609 to 642
Calculation steps:
[( 642 - 609 ) ÷ 609] x 100 = 5.42%
Formula
Percentage change = [(642 - 609) / 609] x 100
Subtract the new number by the original number
642 - 609 = 33
33 ÷ 609 = 0.054187192118226604
0.054187192118226604 x 100 = 5.42%