-16.17% is the change from 668 to 560
Calculation steps:
[( 560 - 668 ) ÷ 668] x 100 = -16.17%
Formula
Percentage change = [(560 - 668) / 668] x 100
Subtract the new number by the original number
560 - 668 = -108
-108 ÷ 668 = -0.16167664670658682
-0.16167664670658682 x 100 = -16.17%