def solve(a):
    ans = sum(a)
    return ans

 

c = int(input())

for i in range(c):
    count = 0
    answer = 0
    score = list(map(int, input().split()))
        
    avg = sum(score[1:]) / score[0]
    for x in score[1:]:
        if x > avg:
            count += 1
            
    answer = (count / score[0]) * 100
    
    print('%.3f' % answer + "%")

 

n = int(input())
ox = []

for i in range(n):
    ox.append(input())

for x in ox:
    count = 0
    answer = 0
    for k in range(len(x)):
        if x[k] == "O":
            count += 1
            answer += count
        else:
            count = 0
            
    print(answer)

n = int(input())
score = list(map(int, input().split()))
score_change = []

for x in range(n):
    score_change.append(score[x]/max(score)*100)
    
avg = sum(score_change)/n
print(avg)

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