-9.87% is the change from 669 to 603
Calculation steps:
[( 603 - 669 ) ÷ 669] x 100 = -9.87%
Formula
Percentage change = [(603 - 669) / 669] x 100
Subtract the new number by the original number
603 - 669 = -66
-66 ÷ 669 = -0.09865470852017937
-0.09865470852017937 x 100 = -9.87%