Specifying number of decimals to display on a numeric variable

An onLoadProgress listener object is returning a variable I am using to tell the user what percentage of the movie has been loaded. I am happy with the results of

myListener.onLoadProgress = function(empty10MC:MovieClip, loaded:Number, total:Number):Void{
    //setText();
    var percent:Number = loaded/total*100;
    loadingTxt.text = beginTxt + percent + endTxt;

, however the number returned is like 15 digits long! Is there any way I can limit the variable to display only 1 or 2 decimal places?