#include <stdio.h>
int main ()
{
int t , n , i , j , a[1500] ,sum ,avg , cnt ,p ;
float favg ;
scanf ("%d",&t) ;
for (i= 1 ;i <= t ; i++)
{
scanf ("%d",&n) ;
sum =0 ;
for (j= 1 ; j <=n ; j++)
{
scanf ("%d",&a[j] ) ;
sum = sum + a[j] ;
}
float(avg) = (double) sum / n ;
cnt =0 ;
for (p=1 ; p <= n ; p++)
{
if (a[p] > avg) cnt ++ ;
}
favg = (double) (cnt * 100) /n ;
printf ("%.3f%%\n",favg) ;
}
return 0 ;
}
int main ()
{
int t , n , i , j , a[1500] ,sum ,avg , cnt ,p ;
float favg ;
scanf ("%d",&t) ;
for (i= 1 ;i <= t ; i++)
{
scanf ("%d",&n) ;
sum =0 ;
for (j= 1 ; j <=n ; j++)
{
scanf ("%d",&a[j] ) ;
sum = sum + a[j] ;
}
float(avg) = (double) sum / n ;
cnt =0 ;
for (p=1 ; p <= n ; p++)
{
if (a[p] > avg) cnt ++ ;
}
favg = (double) (cnt * 100) /n ;
printf ("%.3f%%\n",favg) ;
}
return 0 ;
}