-26.95% is the change from 668 to 488
Calculation steps:
[( 488 - 668 ) ÷ 668] x 100 = -26.95%
Formula
Percentage change = [(488 - 668) / 668] x 100
Subtract the new number by the original number
488 - 668 = -180
-180 ÷ 668 = -0.2694610778443114
-0.2694610778443114 x 100 = -26.95%