The Rational

 Introduction
 The rational is a number that is represented by two parts, a numerator and a denominator. To programmatically find this number, first get their greatest common divisor. Then, get the rational. Here is an example of finding a rational:
```using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Arithmetic
{
public static class Exercise
{
public static int GreatestCommonDivisor(int a, int b)
{
int Remainder;

while (b != 0)
{
Remainder = a % b;
a = b;
b = Remainder;
}

return a;
}

public static string GetRational(int a, int b)
{
string Result;
int gcd = GreatestCommonDivisor(a, b);
int Numerator, Denominator;

Numerator = a / GreatestCommonDivisor(a, b);
Denominator = b / GreatestCommonDivisor(a, b);
Result = string.Format("{0}/{1}", Numerator, Denominator);
return Result;
}
}

public class Program
{
static int Main(string[] args)
{
int x, y;

Console.WriteLine("This program allows calculating " +
"the Greatest Common Divisor");
Console.Write("Enter Value 1: ");
Console.Write("Enter Value 2: ");

Console.WriteLine("\nThe Greatest Common Divisor of {0} and {1} is {2}.",
x, y, Arithmetic.GreatestCommonDivisor(x, y));
Console.WriteLine("Rational: {0}\n", Arithmetic.GetRational(x, y));

return 0;
}
}
}```

Here is an example of running the program:

```This program allows calculating the rational
Enter Value 1: 15
Enter Value 2: 3

The Greatest Common Divisor of 15 and 3 is 3.
Rational: 5/1

Press any key to continue . . .```

Here is another example of running the program:

```This program allows calculating the rational
Enter Value 1: 64
Enter Value 2: 12

The Greatest Common Divisor of 64 and 12 is 4.
Rational: 16/3

Press any key to continue . . .```

Here is one more example of running the program:

```This program allows calculating the rational
Enter Value 1: 84024
Enter Value 2: 128

The Greatest Common Divisor of 84024 and 128 is 8.
Rational: 10503/16

Press any key to continue . . .```