#include<bits/stdc++.h>
#include<cstring>
#include<queue>
#include<set>
#include<stack>
#include<vector>
#include<map>
#define ll long long
using namespace std;
const int N=1e5+10;
const int M=2023;
const int inf=0x3f3f3f3f;
double n,m;
int main()
{
	cin>>n>>m;
	char c='%';
	printf("%.3f%c",(m/n)*100,c);
	return 0;
}

#include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;
const int N = 1e6 + 10;
const int INF = 0x3f3f3f3f;
int main()
{
	float a , b;
	cin >> a >> b;
	a = b / a;
	cout << fixed << setprecision(3) << a * 100 << "%";
	return 0;
}

#include <bits/stdc++.h>

using namespace std;

int main(void)
{
    float s;
    float d;

    float h;

    cin >> s >> d;

    h = d / s * 100;

    cout << fixed << setprecision(3) << h << '%';

    return 0;
}

#include<stdio.h>
int main()
{
    double a,b;
    scanf("%lf%lf",&a,&b);
    printf("%.3lf",b/a*100);
    printf("%%");
    return 0;
}

#include <iostream>
#include <iomanip>
using namespace std;
int main(){
    double n,m;
    cin>>n>>m;
    m/=n;
    cout<<fixed<<setprecision(3)<<m*100<<"%"<<endl;
    return 0;
}

#include <iostream> #include <iomanip> using namespace std; int main(){ double n,m; cin>>n>>m; m/=n; cout<<fixd<<setprecision(3)<<m*100<<"%"<<endl; return 0; }

#include <stdio.h> #include<math.h> #include <iostream> using namespace std; int main() { double a,b; cin>>a>>b; b/=a; printf("%.3f",b*100); cout<<"%"; }

#include <iostream> #include <iomanip> using namespace std; int main(){ double n,m; cin>>n>>m; m/=n; cout<<fixed<<setprecision(3)<<m*100<<"%"<<endl; return 0; }