#include <bits/stdc++.h> #define int long long using namespace std; int h,m; signed main () { cin >> h >> m; int ans; if (m <= h) { ans = m * (m + 1) / 2; } else { ans = h * m - h * (h - 1) / 2; } h *= m; int g = __gcd(ans,h); cout << ans / g; cout << '/'; cout << h / g << endl; return 0; }