-41.9% is the change from 673 to 391
Calculation steps:
[( 391 - 673 ) ÷ 673] x 100 = -41.9%
Formula
Percentage change = [(391 - 673) / 673] x 100
Subtract the new number by the original number
391 - 673 = -282
-282 ÷ 673 = -0.41901931649331353
-0.41901931649331353 x 100 = -41.9%