limit = 10 ** 5
primes = []
is_prime = [True] * (limit + 1)
is_prime[0] = False
is_prime[1] = False

for p in range (0, limit + 1):
    if not is_prime[p]:
        continue
    primes.append(p)
    for i in range(p*2, limit + 1, p):
        is_prime[i] = False

acc = [0] * (limit + 1)
for i in range(1, limit + 1):
    acc[i] = acc[i - 1] + is_prime[i]

T = int(input())
for _ in range(T):
    N, P, Q = map(int, input().split())
    P /= 100.0
    Q /= 100.0
    Z  = acc[N] / N

    print((Z * P) / (Z * P + (1.0 - Z) * (1.0 - Q)))