def gcd(a,b):
    if b==0:
        return a
    return gcd(b,a%b)
X = input().strip()
if "." not in X:
    x = int(X)
    y = 1
else:
    Y = list(X.split("."))
    k = len(Y[1])
    if Y[1]=="0":
        x = int(Y[0])
        y = 1
    elif Y[0]=="0":
        x = int(Y[1])
        y = 10**k
    else:
        x = int(Y[0]+Y[1])
        y = 10**k
d = gcd(x,y)
print(f"{x//d}/{y//d}")