-26.28% is the change from 666 to 491
Calculation steps:
[( 491 - 666 ) ÷ 666] x 100 = -26.28%
Formula
Percentage change = [(491 - 666) / 666] x 100
Subtract the new number by the original number
491 - 666 = -175
-175 ÷ 666 = -0.2627627627627628
-0.2627627627627628 x 100 = -26.28%