-94.93% is the change from 671 to 34
Calculation steps:
[( 34 - 671 ) ÷ 671] x 100 = -94.93%
Formula
Percentage change = [(34 - 671) / 671] x 100
Subtract the new number by the original number
34 - 671 = -637
-637 ÷ 671 = -0.9493293591654247
-0.9493293591654247 x 100 = -94.93%