-16.09% is the change from 603 to 506
Calculation steps:
[( 506 - 603 ) ÷ 603] x 100 = -16.09%
Formula
Percentage change = [(506 - 603) / 603] x 100
Subtract the new number by the original number
506 - 603 = -97
-97 ÷ 603 = -0.16086235489220563
-0.16086235489220563 x 100 = -16.09%