#include<iomanip>
#include<cmath>
#include<cstdio>
#include<bits/stdc++.h>
using namespace std;
int a,b; 
int main()
{
	cin>>a>>b;
	double m=b*1.0/a;
	cout<<fixed<<setprecision(3)<<m*100<<"%";
	return 0;
}