Hello:<br /><br />That is a very good question, because it really depends on which style guide you follow. Some will say to always use the hyphen with fractions (CMS), but others will say to only use when the fraction is acting as a compound modifier (I suggested using it because my goal is always clarity). So you can actually do it either way. If you are more comfortable leaving it out, then please feel free, and know that you are not wrong.<br /><br />Thanks!<br />EditPro