-12.87% is the change from 668 to 582
Calculation steps:
[( 582 - 668 ) ÷ 668] x 100 = -12.87%
Formula
Percentage change = [(582 - 668) / 668] x 100
Subtract the new number by the original number
582 - 668 = -86
-86 ÷ 668 = -0.12874251497005987
-0.12874251497005987 x 100 = -12.87%