-51.19% is the change from 672 to 328
Calculation steps:
[( 328 - 672 ) ÷ 672] x 100 = -51.19%
Formula
Percentage change = [(328 - 672) / 672] x 100
Subtract the new number by the original number
328 - 672 = -344
-344 ÷ 672 = -0.5119047619047619
-0.5119047619047619 x 100 = -51.19%