#include <bits/stdc++.h>
using namespace std;

//辗转相除法
int measure(int x, int y)
{
    int z = y;
    while(x%y!=0)
    {
        z = x%y;
        x = y;
        y = z;
    }
    return z;
}

int main() {
    int a,b,c;
    cin>>a>>b>>c;

    int max=0,min=10000000;

    if(a>max) max=a;
    if(b>max) max=b;
    if(c>max) max=c;

    if(a<min) min=a;
    if(b<min) min=b;
    if(c<min) min=c;

    int gcd=measure(min,max);

    cout<<min/gcd<<"/"<<max/gcd<<endl;
    return 0;
}