/**
 * 輸入數字, 去除右邊多餘的零, 再補百分比%
 * */
public String getAMS_TAX_RATE_WithPercent(String tax_rate){
 if(tax_rate.length()>0){
  String percent = "";
  StringBuffer per = new StringBuffer("%");
  
  float f_tax_rate = Float.parseFloat(tax_rate);
  percent = String.valueOf(f_tax_rate);

  if(percent.endsWith("0")){
   percent = percent.substring(0, percent.indexOf("."));
  }
  percent = percent + "%,";
  
  return percent;
 }else{
  return "";
 }
 
}