jQuery.fn.dataTableExt.oSort['formatted-num-asc'] = function(x,y){
    x = x.replace(/[^\d\-\.\/]/g,'');
    y = y.replace(/[^\d\-\.\/]/g,'');
    if(x.indexOf('/')>=0)x = eval(x);
    if(y.indexOf('/')>=0)y = eval(y);
    return x/1 - y/1;
}
jQuery.fn.dataTableExt.oSort['formatted-num-desc'] = function(x,y){
    x = x.replace(/[^\d\-\.\/]/g,'');
    y = y.replace(/[^\d\-\.\/]/g,'');
    if(x.indexOf('/')>=0)x = eval(x);
    if(y.indexOf('/')>=0)y = eval(y);
    return y/1 - x/1;
}