-48.74% is the change from 673 to 345
Calculation steps:
[( 345 - 673 ) ÷ 673] x 100 = -48.74%
Formula
Percentage change = [(345 - 673) / 673] x 100
Subtract the new number by the original number
345 - 673 = -328
-328 ÷ 673 = -0.487369985141159
-0.487369985141159 x 100 = -48.74%