-16.14% is the change from 663 to 556
Calculation steps:
[( 556 - 663 ) ÷ 663] x 100 = -16.14%
Formula
Percentage change = [(556 - 663) / 663] x 100
Subtract the new number by the original number
556 - 663 = -107
-107 ÷ 663 = -0.16138763197586728
-0.16138763197586728 x 100 = -16.14%