#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<n;i++)

int main(){
  string s;
  cin>>s;
  int cur=-1;
  for(int i=0;i<s.length();i++){
    if(s.at(i)=='.'){
      cur=i;
      break;
    }
  }
  if(cur==(-1)){
    cout<<s<<"/"<<1<<endl;
    return 0;
  }
  ll m=0;
  for(int i=0;i<s.length();i++){
    if(i==cur) continue;
    m*=10;
    m+=(s.at(i)-'0');
  }
  //cout<<m<<endl;
  ll c=1;
  c=pow(10,s.length()-cur-1);
  //cout<<c<<endl;
  ll x=gcd(m,c);
  //cout<<x<<endl;
  cout<<m/x<<"/"<<c/x<<endl;

  return 0;
}