小数与百分数的互化

<script type="text/javascript">

   //小数化百分数
      Number.prototype.toPercent = function(n){
      n = n || 2;return ( Math.round( this * Math.pow( 10, n + 2 ) ) / Math.pow( 10, n ) ).toFixed( n ) + '%';}
      var A=0.358975, B=0.25554;
      alert([A, A.toPercent(2), B, B.toPercent(2)].join('\n'));

 

  //百分数化小数

      var s1=23;
      var s2=s1*(27/100); //s1*27%
      var s3=s2.toFixed(2);

</script>