-18.06% is the change from 609 to 499
Calculation steps:
[( 499 - 609 ) ÷ 609] x 100 = -18.06%
Formula
Percentage change = [(499 - 609) / 609] x 100
Subtract the new number by the original number
499 - 609 = -110
-110 ÷ 609 = -0.180623973727422
-0.180623973727422 x 100 = -18.06%