-48.73% is the change from 671 to 344
Calculation steps:
[( 344 - 671 ) ÷ 671] x 100 = -48.73%
Formula
Percentage change = [(344 - 671) / 671] x 100
Subtract the new number by the original number
344 - 671 = -327
-327 ÷ 671 = -0.4873323397913562
-0.4873323397913562 x 100 = -48.73%