X = list(map(str, input().split('.')))
import math
if len(X) == 2:
    a, b = X[0], X[1]
    b = b+'0'*(8-len(b))
    a = int(a)
    b = int(b)
    a *= 10**8

    g = math.gcd(a+b, 10**8)
    s = (a+b)//g
    B = (10**8)//g
    print(str(s)+'/'+str(B))
else:
    print(X[0]+'/'+'1')