n = int(input())
for _ in range(n):
    scores = list(map(int, input().split()))
    a=scores[0]
    b=[x for x in scores if x != a]
    m=sum(b)/a
    count = 0
    for i in b:
        if i > m:
            count += 1
    r=float((count/a)*100)
    print('{0:.3f}%'.format(r))