-34.43% is the change from 671 to 440
Calculation steps:
[( 440 - 671 ) ÷ 671] x 100 = -34.43%
Formula
Percentage change = [(440 - 671) / 671] x 100
Subtract the new number by the original number
440 - 671 = -231
-231 ÷ 671 = -0.3442622950819672
-0.3442622950819672 x 100 = -34.43%