#include <bits/stdc++.h>
using namespace std;
int main()
{
    double a,b;
    cin>>a>>b;
    printf("%.3f",b/a*100.0);
    cout<<"%";
    return 0;
}

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int a,b;
    cin >> a >> b;
    double c = b*1.0/a*100;
    printf("%.3lf%c",c,'%');
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
long double q,w,e,r,t,y,u,i,o,p,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
string s;
long long a[100000],as[100000],asd[100000];
int main()
{
	cin>>x>>y;
	cout<<fixed<<setprecision(3)<<y/x*1.0000*100<<"%";
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
long double q,w,e,r,t,y,u,i,o,p,d,f,g,h,j,k,l,z,x,c,v,b,n,m;
string s;
long long a[100000],as[100000],asd[100000];
int main()
{
	cin>>x>>y;
	cout<<fixed<<setprecision(3)<<y/x*1.0000*100<<"%";
    return 0;
}