Sorry, somehow my whole post gone. So I will repeat it again.Thank you for replies.1. Similar to your suggestion, but a bit better, which I found here, is this:
<sup>2</sup>⁄<sub>11</sub>
2. A very good discussion about the fraction problem (and other math symbols problem in HTML) I found here. It proved that there is no simple solution in displaying math symbols in HTML.3. Here I found a way to display fractions inline. It really works in IE (at least in v6.0), but it doesn't work on FireFox, so this isn't a solution.4.I have installed MathML (and Editor from here), still not sure how to use it, but I already got some promising results. But only some things works in IE and some other things in FireFox.Anyway, this isn't a solution I was looking for, because MathML requires additional installation for user, which isn't the best thing at all.5.The last option is to make all those things myself (with JavaScript or PHP). Actually this is the only option for me.(maybe I will use 1. solution if I have no more time)But it is still hard to believe that there is no simple way to display fractions in HTML (inline).