Allen:
I'm just playing around here, but I think AutoCorrect is your best bet. To
create the AutoCorrect entry, you can use an actual character, or fake the
character using superscript and subscript.
If the font you're using actually has characters for the fractions you
desire, use Insert > Symbol to insert them. For example, in MS Arial Unicode,
I was able to find a character for 1/3 in the Number Forms subset. Select the
character, then click Tools > AutoCorrect. You'll see the selection in the
With box in the Replace Text As You Type area. In the Replace box, type 1/3
(i.e. 1, slash, 3). Then whenever you type 1/3, AutoCorrect will replace
those three characters with the single fraction.
If the font doesn't have the character, or you want something like 117/32...
Create the "simualted" fraction by typing 117, then the division sign (it's
different from the slash -- use Insert > Symbol and look in the Mathematical
Operators subset), then 32. Select 117 and click Format > Font > Superscript.
Select 32 and click Format > Font > Subscript. This gives you a rough
approximation of a single-character fraction.
Again, you can add this to your AutoCorrect entries if you like, BUT this
time you have to select Formatted Text, rather than Plain Text in the Replace
area, to preserve the sub- and superscript formatting.
Bear