So "File > Properties > Displayed Part" for both the model and drawing parts shows "Units: Inches"?
Right click on the Drawing Sheet in the Part Navigator and choose "Edit Sheet" and then expand the Settings block on the Sheet dialog - what does it show for Units?
You can change the units of your dimensions by selecting "Menu > Preferences > Drafting".
Go to "[+] Dimension > [+] Text > Units" and change the Units.
In the drafting application, go to menu -> preferences -> drafting, then go to dimension -> text -> units and select the desired units to use. Also make this change in your drafting template and save the template; this will save your preference for future drawings that you create from the template.
Edit: @BenBroad was quicker on the draw...