Reescrita de Operador

operador.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var p = 100 - 33.Percent();
            Console.WriteLine(p);
            Console.ReadLine();
        }   
    }
    
    #region Resolução
    public class Percent
    {
        public float Value { get; set; }

        public Percent(float value)
        {
            Value = value;
        }

        public static float operator -(float x, Percent y)
        {
            return x - CalcPercent(x, y);
        }

        public static float operator +(float x, Percent y)
        {
            return x + CalcPercent(x, y);
        }

        public static float operator *(float x, Percent y)
        {
            return x * CalcPercent(x, y);
        }

        public static float operator /(float x, Percent y)
        {
            return x / CalcPercent(x, y);
        }

        private static float CalcPercent(float x, Percent y)
        {
            return (x * (y.Value / 100));
        }
    }

    public static class Methods
    {
        public static Percent Percent(this int self)
        {
            return new Percent(self);
        }
    }
    #endregion Resolução
}