-32.94% is the change from 671 to 450
Calculation steps:
[( 450 - 671 ) ÷ 671] x 100 = -32.94%
Formula
Percentage change = [(450 - 671) / 671] x 100
Subtract the new number by the original number
450 - 671 = -221
-221 ÷ 671 = -0.3293591654247392
-0.3293591654247392 x 100 = -32.94%