-27.25% is the change from 668 to 486
Calculation steps:
[( 486 - 668 ) ÷ 668] x 100 = -27.25%
Formula
Percentage change = [(486 - 668) / 668] x 100
Subtract the new number by the original number
486 - 668 = -182
-182 ÷ 668 = -0.27245508982035926
-0.27245508982035926 x 100 = -27.25%