-9.46% is the change from 666 to 603
Calculation steps:
[( 603 - 666 ) ÷ 666] x 100 = -9.46%
Formula
Percentage change = [(603 - 666) / 666] x 100
Subtract the new number by the original number
603 - 666 = -63
-63 ÷ 666 = -0.0945945945945946
-0.0945945945945946 x 100 = -9.46%