import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        String s = sc.next();
        long x;
        long y = 1;
        if (s.contains(".")) {
            x = Long.parseLong(s.substring(0, s.indexOf(".")));
            int length = s.length() - s.indexOf(".") - 1;
            for (int i = 0; i < length; i++) {
                x *= 10;
                y *= 10;
            }
            x += Long.parseLong(s.substring(s.indexOf(".") + 1, s.length()));
        } else {
            x = Long.parseLong(s);
        }
        long gcd = getGCD(x, y);
        System.out.println((x / gcd) + "/" + (y / gcd));
    }
    
    static long getGCD(long x, long y) {
        if (x % y == 0) {
            return y;
        } else {
            return getGCD(y, x % y);
        }
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}