It's not clear to me what the question is either, but another way to make pseudo fractions would be:
css:
Code:
.den {font-size: 80%;}
.num {font-size: 80%; vertical-align:.5ex}
html:
Code:
<span class="num">22</span>/<span class="den">7</span>
Benefit is any fraction is covered, as only the common ones are explicitly called out in unicode. It's also guaranteed to work across fonts. Downside is I don't know how well it translates to older formats like mobi with limited styling capabilities.