Darftsight unit precision with fractions

I'm having probems in regards to dimensioning lines when importing a dwg in draftsight.  When I use the linear measuring tool on a line, it shows as a whole number (25") instead of 24 1/2".  I tried going to Options>Drawing Settings>Unit System>Length>Type: Fraction>Precision: 1/16>Apply.  When I clicked apply, all my factional dimensions on the drawing is converted to a whole number.

Thanks in advance.