mod = 1000000007
eps = 10**-9


def main():
    import sys
    from math import gcd
    input = sys.stdin.readline

    S = input().rstrip('\n')
    if "." not in S:
        print(S + "/1")
    else:
        x, y = S.split(".")
        L = len(y)
        x = int(x)
        y = int(y)
        g = gcd(10**L, x * 10**L + y)
        print(str((x * 10**L + y) // g) + "/" + str((10**L) // g))


if __name__ == '__main__':
    main()