#include<bits/stdc++.h> using namespace std; #define int long long int h,m,ans,sum; int S(int a,int b){ int num=b-a+1; return (a+b)*num/2; } int gcd(int a,int b){ if(a<b)swap(a,b); if(a%b==0)return b; return gcd(b,a%b); } signed main(){ scanf("%lld%lld",&h,&m); ans=S(max(1ll,m-h+1),m); sum=h*m; int k=gcd(sum,ans); ans/=k;sum/=k; printf("%lld/%lld\n",ans,sum); fclose(stdin);fclose(stdout); return 0; }