-16.82% is the change from 666 to 554
Calculation steps:
[( 554 - 666 ) ÷ 666] x 100 = -16.82%
Formula
Percentage change = [(554 - 666) / 666] x 100
Subtract the new number by the original number
554 - 666 = -112
-112 ÷ 666 = -0.16816816816816818
-0.16816816816816818 x 100 = -16.82%