171127_4344_평균은 넘겠지

	//https://www.acmicpc.net/problem/4344 #include <iostream>
	#include <stack>
	using namespace std;
	int main()
	{
	int C;
	cin >> C;
	for(int i=0; i<C; i++)
	{
	int N;
	int sum=0;
	int avg;
	int cnt=0;
	stack<int> s;
	cin >> N;
	for(int j=0; j<N; j++)
	{
	int x;
	cin >> x;
	sum+=x;
	s.push(x);
	}
	avg=sum/N;
	for(int j=0; j<N; j++)
	{
	int x=s.top();
	if(x>avg) cnt++;
	s.pop();
	}
	float percent = ((float) cnt/ (float) N )*100;
	cout << fixed;
	cout.precision(3);
	cout << percent << "%" << endl;
	}
	}