m = 10**5; f = [0,0]+[1]*(m-1)
for i in range(2,m+1):
    if f[i]:
        for j in range(i+i,m+1,i): f[j] = 0
for i in range(m): f[i+1] += f[i]
for _ in range(int(input())):
    n,p,q = map(int,input().split())
    print(f[n]*p/(f[n]*p+(n-f[n])*(100-q)))