-39.94% is the change from 671 to 403
Calculation steps:
[( 403 - 671 ) ÷ 671] x 100 = -39.94%
Formula
Percentage change = [(403 - 671) / 671] x 100
Subtract the new number by the original number
403 - 671 = -268
-268 ÷ 671 = -0.39940387481371087
-0.39940387481371087 x 100 = -39.94%