-51.27% is the change from 671 to 327
Calculation steps:
[( 327 - 671 ) ÷ 671] x 100 = -51.27%
Formula
Percentage change = [(327 - 671) / 671] x 100
Subtract the new number by the original number
327 - 671 = -344
-344 ÷ 671 = -0.5126676602086438
-0.5126676602086438 x 100 = -51.27%