-16.29% is the change from 663 to 555
Calculation steps:
[( 555 - 663 ) ÷ 663] x 100 = -16.29%
Formula
Percentage change = [(555 - 663) / 663] x 100
Subtract the new number by the original number
555 - 663 = -108
-108 ÷ 663 = -0.16289592760180996
-0.16289592760180996 x 100 = -16.29%