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

int main()
{
    double a,b,c;
    cin >> a >> b;
    c = b / a * 100; //扩大100倍
    cout << fixed << setprecision(3) << c << "%" << endl;
    return 0;
}

#include<stdio.h> int main(){ float i,j; float k=0; scanf("%f %f",&i,&j); k=j*100/i; printf("%.3f",k); printf("%%"); return 0; }