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

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

int main() {
	fast_io();
	const int M = 1e5 + 5;
	vector<bool> is_prime(M, true);
	is_prime[0] = is_prime[1] = false;
	for (int i = 2; i < M; i++) {
		if (is_prime[i]) {
			for (int j = i + i; j < M; j += i) {
				is_prime[j] = false;
			}
		}
	}
	vector<double> pr(M, 0);
	{
		int cnt = 0;
		for (int i = 1; i < M; i++) {
			cnt += is_prime[i];
			pr[i] = cnt / (double)i;
		}
	}
	int t;
	cin >> t;
	for (; t--;) {
		int n, P, Q;
		cin >> n >> P >> Q;
		double p = P * 0.01, q = Q * 0.01;
		double ans = p * pr[n] / (p * pr[n] + (1 - q) * (1 - pr[n]));
		cout << setprecision(16) << fixed << ans << "\n";
	}
}