#include<cstdlib>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<cstdio>
#include<iostream>
#include<string>
#include<vector>
#include<queue>
#include<map>
#include<stack>
#include<set>

using namespace std;

int gcd(int x,int y)
{
    if(x%y)
        return gcd(y,x%y);
    return y;
}

int main()
{
    int n,m;
    while(cin>>n>>m)
    {
        int x=n*m,y=n+m;
        cout<<x/gcd(x,y)<<'/'<<y/gcd(x,y)<<endl;
    }
    return 0;
}