10.02% is the change from 609 to 670
Calculation steps:
[( 670 - 609 ) ÷ 609] x 100 = 10.02%
Formula
Percentage change = [(670 - 609) / 609] x 100
Subtract the new number by the original number
670 - 609 = 61
61 ÷ 609 = 0.10016420361247948
0.10016420361247948 x 100 = 10.02%