How to show percentage in 1 frame?

Hello guys, the problem is:

Im loading some swfs with loadmovie technique to my mainmovie.
Thereis a mc_container layer and transitions layer, while the movie is loading,
the transation layers alpha increase to 100% and mask the loading area with some animation, and during that animation I wanna show the % percentage of the movie. Howcan I do that ?
The mc_container code is:

onClipEvent (enterFrame) {
 if (!loaded && this._url != _root._url) {
   LB = this.getBytesLoaded();
		 TB = this.getBytesTotal();
   PC = Math.floor((LB/TB)*100);
	 _root.transition.pc = PC;
  if (this.getBytesLoaded() == this.getBytesTotal()) {
   loaded = true;