-39.67% is the change from 668 to 403
Calculation steps:
[( 403 - 668 ) ÷ 668] x 100 = -39.67%
Formula
Percentage change = [(403 - 668) / 668] x 100
Subtract the new number by the original number
403 - 668 = -265
-265 ÷ 668 = -0.3967065868263473
-0.3967065868263473 x 100 = -39.67%