-16.91% is the change from 609 to 506
Calculation steps:
[( 506 - 609 ) ÷ 609] x 100 = -16.91%
Formula
Percentage change = [(506 - 609) / 609] x 100
Subtract the new number by the original number
506 - 609 = -103
-103 ÷ 609 = -0.16912972085385877
-0.16912972085385877 x 100 = -16.91%