#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <vector>
#include <queue>
#include <map>
#include <cmath>
#include <string>
using namespace std;

int main() {
    int n, m;
    while (scanf("%d%d", &n, &m) != EOF) {
        int a = n*m;
        int b = n + m;
        int g = __gcd(a, b);
        printf("%d/%d\n", a/g, b/g);
    }
}