#include <iostream>

using namespace std;

long long a[];

long long b[];

int main()

{

    int C;

    a[] = ;

    a[] = ;

    b[] = ;

    b[] = ;

    for (long i = ; i <= ; i++)

    {

        a[i] = (i - )*(a[i - ] + a[i - ]);

        b[i] = i*b[i - ];

    }

    while (cin >> C)

    {

        while (C--)

        {

            int n;

            cin >> n;

            printf("%.2lf", 100.0*a[n] / b[n]);

            cout << "%" << endl;

        }

    }

}