#include<stdio.h>
int gcd(int a,int b){
    if(b==0) return a;
    return gcd(b,a%b);
}
int main(){
    int m,n,i,j,k,fenmu,fenzi;
    while(scanf("%d %d",&m,&n)==2){
        fenzi=n*m;
        fenmu=n+m;
        printf("%d/%d\n",fenzi/gcd(fenzi,fenmu),fenmu/gcd(fenzi,fenmu));
    }
}