Using fractions like ½ in text

I've some mediaeval RTF study documents which include fractions. They display fine in TextEdit (but other aspects of the formatting do not) but I can find no way to get them to display in AppleWorks 6.2.9.

I can open Character Palette in TextEdit, and select fractions (and all sorts of other things). I can drag e.g. ½ from Character Palette to here. But not in AppleWorks? I appear to have three copies of many fonts. I wonder whether removing all but the one which has these extra features would force AppleWorks to use it, but I'm not sure how to go about this (or indeed whether it is a good idea!) If I copy and paste from TextEdit to AppleWorks the fractions turn into question marks? I can copy into Word, but...