using System;

public class Program

{

    public static void Main()

    {

        var date = DateTime.Now.AddMonths(-5).AddDays(-5);

        var daysCount = (DateTime.Now - date).Days;

        var percentOfDays = daysCount / 365.0;

        int investedSum = 100_000;

        var nextSum = investedSum / percentOfDays;

        var plannedSum = 300_000.0;

        double incomePercent = plannedSum / nextSum - 1; 

​

        Console.WriteLine($"next={nextSum} more_percent={incomePercent}");

        Console.WriteLine($"salary_inc={(100_000.0 / 65_000) - 1}");

    }

}