-25.45% is the change from 668 to 498
Calculation steps:
[( 498 - 668 ) ÷ 668] x 100 = -25.45%
Formula
Percentage change = [(498 - 668) / 668] x 100
Subtract the new number by the original number
498 - 668 = -170
-170 ÷ 668 = -0.25449101796407186
-0.25449101796407186 x 100 = -25.45%