import sys
from math import gcd
sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


X = S()
if not '.' in X:
    print(X+'/1')
else:
    i = X.index('.')
    l = len(X)
    a = int(X[:i]+X[i+1:]+'0'*(8-(l-i-1)))
    b = 10**8
    g = gcd(a,b)
    print('{}/{}'.format(a//g,b//g))