-17.57% is the change from 609 to 502
Calculation steps:
[( 502 - 609 ) ÷ 609] x 100 = -17.57%
Formula
Percentage change = [(502 - 609) / 609] x 100
Subtract the new number by the original number
502 - 609 = -107
-107 ÷ 609 = -0.17569786535303777
-0.17569786535303777 x 100 = -17.57%