#include<stdio.h>
using namespace std;
typedef long long LL;
#define max_v 30
int main()
{
    LL sum;
    LL a[max_v];
    a[0]=0;
    a[1]=0;
    a[2]=1;
    for(int i=3;i<=25;i++)
    {
        a[i]=(i-1)*(a[i-1]+a[i-2]);
    }
    int n,t;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        sum=1;
        for(int i=1;i<=n;i++)
            sum*=i;
        printf("%.2lf%%\n",(double)a[n]*100.0/(sum));
    }
    return 0;
}