Converter floating point number to Fraction representation

FloatPointNumberToFraction.cs

 class Program
    {
        static void Main(string[] args)
        {
            double num = 0.3333;
            double denom = 1.0 / (Eps * 10.0);

            num = (int)(num * denom);
            double gcd = (double)find_gcd((int)num, (int)denom);
            num /= gcd;
            denom /= gcd;
            Debug.WriteLine($"{num}/{denom}");
        }

        static int find_gcd(int a, int b)
        {
            while (b>0)
            {
                var t = b;
                b = a % b;
                a = t;
            }
            return a;
        }

        const double Eps = 0.01;
    }