2.46% is the change from 609 to 624
Calculation steps:
[( 624 - 609 ) ÷ 609] x 100 = 2.46%
Formula
Percentage change = [(624 - 609) / 609] x 100
Subtract the new number by the original number
624 - 609 = 15
15 ÷ 609 = 0.024630541871921183
0.024630541871921183 x 100 = 2.46%