X = input()
if "." not in X:
    print(X + "/1")
    exit()

def gcd(a, b):
    if b == 0:
        return a
    return gcd(b, a % b)

l = len(X) - X.index(".") - 1
X = X[:X.index(".")] + X[X.index(".") + 1: len(X)]
g = gcd(int(X), 10 ** l)
print(int(X) // g, "/", (10 ** l) // g, sep = "")