-1.65% is the change from 666 to 655
Calculation steps:
[( 655 - 666 ) ÷ 666] x 100 = -1.65%
Formula
Percentage change = [(655 - 666) / 666] x 100
Subtract the new number by the original number
655 - 666 = -11
-11 ÷ 666 = -0.016516516516516516
-0.016516516516516516 x 100 = -1.65%