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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

ll gcd(ll a, ll b) {
  return (a % b) ? gcd(b,a%b) : b;
}

int main() {
  string x;
  cin >> x;
  reverse(x.begin(), x.end());
  ll lx = 0;
  ll tmp = 1;
  bool flag = true;
  ll c = 1;
  rep(i, x.size()) {
    if (x[i] == '.') {
      flag = false;
      continue;
    }
    lx += tmp*(x[i]-'0');
    tmp *= 10;
    if (flag) c *= 10;
  }
  if (flag) {
    cout << lx << "/" << 1 << endl;
  } else {
    ll g = gcd(lx, c);
    cout << lx/g << "/" << c/g << endl;
  }



}