#include <iostream>
//#include<atcoder/all>
#include <numeric>
#include <cmath>
#include <limits>
#include <stdio.h>
#include <iomanip>
#include <string> 
#include <vector>
#include <algorithm>
#include <utility> 
#include <tuple> 
#include <cstdint> 
#include <cstdio> 
#include <map> 
#include <queue>
#include <set> 
#include <stack> 
#include <deque> 
#include <unordered_map> 
#include <unordered_set>
#include <bitset> 
#include <cctype>
//using namespace atcoder;
using namespace std;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<vector<pair<ll, ll>>>>;
ll gcd(ll(a), ll(b)) {
	ll c = a;
	while (a % b != 0) {
		c = a % b;
		a = b;
		b = c;
	}
	return b;
}

int main() {
	string G;
	cin >> G;
	ll B = 1; ll S = 0;
	bool C = false;
	rep(i, G.size()) {
		if (G[i] != '.') {
			S += G[i] - '0';
			S *= 10;
			if (C)B *= 10;
		}
		else {
			C = true;
		}
	}
	S /= 10;
	cout << S/gcd(S,B) << "/" << B / gcd(S, B) << endl;
}