4344 : 평균은 넘겠지

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int TC = sc.nextInt();

		for (int i = 0; i < TC; i++) {
			double sum = 0;
			double avg = 0;
			double cnt = 0;
			
			int student = sc.nextInt();
			int[] score = new int[student];
			
			for(int j = 0; j<student ; j++) {
				score[j] = sc.nextInt();
			}
			
			for(int j = 0; j<student ; j++) {
				sum += score[j];
			}
			
			avg = sum/student;
			
			for(int j = 0; j<student ; j++) {
				if(avg<score[j]) {
					++cnt;
				}
			}
			System.out.println(String.format("%.3f", cnt/student*100)+"%");
		}
	}
}