-16.32% is the change from 668 to 559
Calculation steps:
[( 559 - 668 ) ÷ 668] x 100 = -16.32%
Formula
Percentage change = [(559 - 668) / 668] x 100
Subtract the new number by the original number
559 - 668 = -109
-109 ÷ 668 = -0.1631736526946108
-0.1631736526946108 x 100 = -16.32%