Above Average

It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.

The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow,
separated by spaces or newlines, each giving the final grade (an integer between 0 and 100) of a student in the class. For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

Sample Input

5

5 50 50 70 80 100

7 100 95 90 80 70 60 50

3 70 90 80

3 70 90 81

9 100 99 98 97 96 95 94 93 91

Output for Sample Input

40.000%

57.143%

33.333%

66.667%

55.556%

#include <stdio.h>

int arr[1002], id;

double ave;

int main()

{

	int t, n, i, count;

	scanf("%d", &t);

	while(t--){

		scanf("%d", &n);

		ave = 0;

		for(i = 0; i < n; ++i){

			scanf("%d", arr + i);

			ave += arr[i];

		}

		ave /= n;

		count = 0;

		for(i = 0; i < n; ++i)

			if(arr[i] > ave) ++count;

		printf("%.3lf%%\n", count * 100.0 / n);

	}

	return 0;

}