#include<bits/stdc++.h> #define ll long long using namespace std; ll gcd(ll a,ll b){ while(b){ ll tmp=b; b=a%b;a=tmp; }return a; } ll calc(ll a,ll b){ return (a+b)*(a-b+1)/2; } int main(){ ll h,m; cin>>h>>m; ll all=h*m; ll tim=calc(m,max(0ll,m-h+1)); ll g=gcd(tim,all); tim/=g;all/=g; cout<<tim<<'/'<<all<<endl; return 0; }