from math import gcd

S = input()
if "." not in S:
    print(f"{S}/1")
    exit()

x, y = S.split(".")
l = len(y)
d = 10 ** l
x = int(x) * d + int(y)
g = gcd(x, d)
x //= g
d //= g
print(f"{x}/{d}")