import sys
from sys import stdin
import math

X = input()

if "." in X:
    A,B = X.split(".")

    bo = 10**len(B)
    si = int(A+B)

    if si == 0:
        print ("0/1")
        sys.exit()

    g = math.gcd(bo,si)
    bo //= g
    si //= g

    print (str(si)+"/"+str(bo))
    
    

else:
    print (X+"/1")