Convert px to em, % and pt

// http://jsfiddle.net/jnelsonin/ctfy158o/
$("#pixels").keyup(function(){      		
 var point = ($(this).val() * 3) / 4;
 var yem = point / 12;
 var percent = yem * 100;
      		
 $("#point").text(point+"pt");
 $("#yem").text(yem+"em");
 $("#percent").text(percent+"%");
});