L=200000
cp=[1]*(L+1)
cp[0]=0
cp[1]=0
for i in range(2,L+1):
  if cp[i]:
    for j in range(i+i,L+1,i):
      cp[j]=0
for i in range(1,L+1):
  cp[i]+=cp[i-1]
T=int(input())
for _ in range(T):
  n,p,q=map(int,input().split())
  a=cp[n]
  b=n-a
  p/=100
  q/=100
  p1=(a/n)*p
  p2=(b/n)*(1-q)
  print(p1/(p1+p2))