#include<iostream>
#include<cmath>
#include<stdio.h>
using namespace std;
typedef long long int ll;
ll n,m;
ll fenzi,fenmu;
ll tmp;
ll gcd(ll a,ll b)
{
    return b==0?a:gcd(b,a%b);
}
int main()
{
    while(~scanf("%lld%lld",&n,&m)&&(n*m))
    {
        fenzi=n*(m-1);
        fenmu=m*m;
        tmp=gcd(fenzi,fenmu);
        fenzi/=tmp;
        fenmu/=tmp;
        printf("%lld/%lld\n",fenzi,fenmu);
    }
    return 0;
}