#include<stdio.h>
#include<math.h>
#include<string.h>
#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
using namespace std;
int gcd(int a,int b)
{
    if(b==0) return a;
    else return gcd(b,a%b);
}
int main()
{
    int n,m;
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        printf("%d/%d\n",n*m/gcd(n*m,n+m),(n+m)/gcd(n*m,n+m));
    }
}