def f1():
    x=input().split()
    x1= []
    for i in x:
        x1.append(int(i))
    y=len(x1)-1
    avg=0
    num=0
    add=0
    if x1[0]==y:
        for i in range(y):
            if i>=0 and i<=100:
                for i in x1[1:]:
                    add +=i
                    avg = add/y
                for i in x1[1:]:
                    if i > avg:
                        num +=1
        k=num /x1[0] * 100
    return k
 
a=int(input())
if a>=1 and a<=1000:
    x=[]
    for i in range(a):
       b=f1()
       x.append(b)
    for i in x:
        print('%.3f%' %i,"%")

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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