-25.75% is the change from 668 to 496
Calculation steps:
[( 496 - 668 ) ÷ 668] x 100 = -25.75%
Formula
Percentage change = [(496 - 668) / 668] x 100
Subtract the new number by the original number
496 - 668 = -172
-172 ÷ 668 = -0.25748502994011974
-0.25748502994011974 x 100 = -25.75%