#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n = 100000;
    vector<int> prime(n+1,1);
    prime.at(0) = 0; prime.at(1) = 0;
    for(int i=2; i*i<=n; i++){
        if(prime.at(i) == 0) continue;
        for(int k=i*i; k<=n; k+=i) prime.at(k) = 0;
    }
    for(int i=1; i<=n; i++) prime.at(i) += prime.at(i-1);
    int T; cin >> T;
    while(T--){
        int N,P,Q; cin >> N >> P >> Q;
        int p = prime.at(N),q = N-p;
        int Yp = p*P,Yq = q*(100-Q);
        cout << fixed << setprecision(20) << (Yp+0.0)/(Yp+Yq) << "\n";
    }
}