using System;

using System.Numerics;

public class Program

{

    public static void Main()

    {

        var userTickets = 12;

        var totalTickets = 144;

        var winningChanceFactor = 0;

​

        //Result1

        var oddsResult1 = (int)((winningChanceFactor + 1) * totalTickets);

        var (userOddsResult1, totalOddsResult1) = MathUtil.SimplifyFraction(userTickets, oddsResult1);

        Console.WriteLine($"{userOddsResult1} in {totalOddsResult1}");

        //Result2

        var totalOddsResult2 = Math.Ceiling((decimal)(userTickets + winningChanceFactor) / (decimal)(userTickets - 1));

        Console.WriteLine($"1 in {totalOddsResult2}");

    }

}

​

public static class MathUtil

{

    public static (int enumerator, int denominator) SimplifyFraction(int enumerator, int denominator)

    {

        if (enumerator == 0 || denominator == 0)

        {

            return (enumerator, denominator);

        }

​

        BigInteger gcd = BigInteger.GreatestCommonDivisor(enumerator, denominator);

        int enumeratorResult = enumerator / (int)gcd;

        int denominatorResult = denominator / (int)gcd;

​

        return (enumeratorResult, denominatorResult);

    }

}