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

#include<bits/stdc++.h> using namespace std; double f; int main(){ cin>>f; cout<<fixed<<setprecision(5)<<5*(f-32)/9; return 0; }