-36.81% is the change from 671 to 424
Calculation steps:
[( 424 - 671 ) ÷ 671] x 100 = -36.81%
Formula
Percentage change = [(424 - 671) / 671] x 100
Subtract the new number by the original number
424 - 671 = -247
-247 ÷ 671 = -0.368107302533532
-0.368107302533532 x 100 = -36.81%