-34.58% is the change from 671 to 439
Calculation steps:
[( 439 - 671 ) ÷ 671] x 100 = -34.58%
Formula
Percentage change = [(439 - 671) / 671] x 100
Subtract the new number by the original number
439 - 671 = -232
-232 ÷ 671 = -0.34575260804769004
-0.34575260804769004 x 100 = -34.58%