check this
CSS
.fraction, .top, .bottom {
padding: 0 5px;
}
.fraction {
display: inline-block;
text-align: center;
}
.bottom{
border-top: 1px solid #000;
display: block;
}
HTML
<span class="fraction">1/2</span>
<span class="fraction">3/4</span>
<span class="fraction">1/32</span>
<span class="fraction">77/102</span>
JQuery
$('.fraction').each(function(key, value) {
var split = $(this).html().split("/")
if( split.length == 2 ){
$this.html('
<span class="top">'+split[0]+'</span>
<span class="bottom">'+split[1]+'</span>
')
}
});
http://jsfiddle.net/xW7d8/
source : How to display "Classic" built-up fractions with an horizontal line in CSS / JavaScript?