using System;

​

public class Program

{

    public static void Main()

    {

        Calc.Reduce(2,4);

    }

}

​

public static class Calc

{

    public static int gcd(int answerNumerator, int answerDenominator)

    {

        // assigned x and y to the answer Numerator/Denominator, as well as an  

        // empty integer, this is to make code more simple and easier to read

        int x = Math.Abs(answerNumerator);

        int y = Math.Abs(answerDenominator);

        int m;

        // check if numerator is greater than the denominator, 

        // make m equal to denominator if so

        if (x > y)

            m = y;

        else

            // if not, make m equal to the numerator

            m = x;

        // assign i to equal to m, make sure if i is greater

        // than or equal to 1, then take away from it

        for (int i = m; i >= 1; i--)

        {

            if (x % i == 0 && y % i == 0)

            {

                //return the value of i

                return i;

            }

        }

​

        return 1;

    }

​

    public static void Reduce(int answerNumerator, int answerDenominator)

    {

        WriteFraction(answerNumerator, answerDenominator);

        try

        {

            //assign an integer to the gcd value

            int gcdNum = gcd(answerNumerator, answerDenominator);

            if (gcdNum != 0)

            {

                answerNumerator = answerNumerator / gcdNum;

                answerDenominator = answerDenominator / gcdNum;

            }

​

            if (answerDenominator < 0)

            {

                answerDenominator = answerDenominator * -1;

                answerNumerator = answerNumerator * -1;

            }

        }

        catch (Exception exp)

        {

            // display the following error message 

            // if the fraction cannot be reduced

            throw new InvalidOperationException("Cannot reduce Fraction: " + exp.Message);

        }

        WriteFraction(answerNumerator, answerDenominator);

    }

    public static void WriteFraction(int answerNumerator, int answerDenominator)

    {

        Console.WriteLine(string.Format("{0}/{1}", answerNumerator, answerDenominator));

    }

}