-25.68% is the change from 666 to 495
Calculation steps:
[( 495 - 666 ) ÷ 666] x 100 = -25.68%
Formula
Percentage change = [(495 - 666) / 666] x 100
Subtract the new number by the original number
495 - 666 = -171
-171 ÷ 666 = -0.25675675675675674
-0.25675675675675674 x 100 = -25.68%