-26.73% is the change from 666 to 488
Calculation steps:
[( 488 - 666 ) ÷ 666] x 100 = -26.73%
Formula
Percentage change = [(488 - 666) / 666] x 100
Subtract the new number by the original number
488 - 666 = -178
-178 ÷ 666 = -0.2672672672672673
-0.2672672672672673 x 100 = -26.73%