-0.16% is the change from 610 to 609
Calculation steps:
[( 609 - 610 ) ÷ 610] x 100 = -0.16%
Formula
Percentage change = [(609 - 610) / 610] x 100
Subtract the new number by the original number
609 - 610 = -1
-1 ÷ 610 = -0.001639344262295082
-0.001639344262295082 x 100 = -0.16%