5.75% is the change from 609 to 644
Calculation steps:
[( 644 - 609 ) ÷ 609] x 100 = 5.75%
Formula
Percentage change = [(644 - 609) / 609] x 100
Subtract the new number by the original number
644 - 609 = 35
35 ÷ 609 = 0.05747126436781609
0.05747126436781609 x 100 = 5.75%