-15.27% is the change from 668 to 566
Calculation steps:
[( 566 - 668 ) ÷ 668] x 100 = -15.27%
Formula
Percentage change = [(566 - 668) / 668] x 100
Subtract the new number by the original number
566 - 668 = -102
-102 ÷ 668 = -0.15269461077844312
-0.15269461077844312 x 100 = -15.27%