class KP1{

 double m1(String[] s, char simbolis){
 int suma=0;
 for(int i=0; i<s.length; i++){
   if(s[i].charAt(0) == simbolis) suma++;
  }
 double proc = (suma*100)/s.length;
 return proc;
}

 public static void main(String[] args){
   String[] ch = {"ebc", "afg", "ws", "w", "f"};
   KP1 g = new KP1();
   double j;
   j = g.m1(ch, 'w');
   System.out.println(j+"%");
 }

}


class KP1{

 float m1 (String [] a)
 {

  int sum=0;
  int l = a.length;
        for (int i=0; i<a.length; i++)
        { if (a[i].startsWith("a"))
         sum= sum +1;}

  float  n= (float)sum/l*100;
  return n;
}


public static void main (String []args)
{

       String   a[]={"aha","io", "ia"};
       KP1 k = new KP1();
    System.out.println(k.m1(a));


}
}
