Anyone know the correct solution to this (aside from using "percent" instead of "%")
perhaps one can change the TeX version of $PERCENT so that it uses the tex \ensuremath command?
then it could be used inside math mode -- in fact it would always think it was in math mode
If some one can do some experimenting in TeX to find the most desirable behavior I can change $PERCENT's
TeX version to behave that way.