i am running autocad 2010 and am wanting to figure out how i can dim in decimal feet only, not in feet-inches.checking the dimstyle, it seems that i can do decimal, but its feet and then decimal inches....but nothing allows me to do decimal feet only:eg:  instead of 6'-8" ----> i want 6.67'thanks for the help!

Change your UNITS to Engineering instead and it should work just fine.

Engineering changes it to 1'-5.375" not 1.45'

Then change the dimension scale factor.  Since you know that 1"=0.0833 then do the math.

Set the UNITS for your drawing to Decimal and the precision to 0.00 and build your model accordingly.  Everything you draw will be in feet and decimal units. 
 
If you also want your dimensions to read correctly, simply create a DIMSTYLE that includes the ' (ft) symbol as a suffix ... you'll find this setting option in the Primary Units tab of the style manager.  The Unit format for Linear dimensions in that same tab should be set to decimal.
 
Daveheinsite2012-04-24 04:02:38

As heinsite says but you can draw it normal scale and then scale the dimension 1/12 to put the decimal in the desired format.

Exactly so.  If your existing drawing doesn't dimension correctly you will have to SCALE it appropriately.  My tip was intended for drawings going forward... the new stuff.
 
And a lot of this should be set up in a template file so you don't have to hassle with it for each drawing and end up getting everything a little bit different.  That's where nightmares come from.
 
Dave.

thank you all for the tips...as soon as he said "dim scale factor", i realized what needed to be done....i had a very long day yesterday.thank you all for the help!!

Dim Scale Factor wins the day.  Glad to hear it worked for you.Thanks for the update too.