#include<cstdio>
#include<cctype>
#include<string.h>
#include<math.h>
#include<cmath>
#include<algorithm>
#include<bits/stdc++.h>
using namespace std;
int main()
{
	long long a,b;
	cin>>a>>b;
	double jl=(double)b*100/a;
	cout<< fixed<<setprecision(3)<<jl<<"%";
	return 0;
}