using System;

public class Program

{

    public class Rectangle {

        public float X {get;set;}

        public float Y {get;set;}

        public float Width {get;set;}

        public float Height{get;set;}

    }

    public static void Main()

    {

        var a = new Rectangle {

            X = 10,

            Y = 10,

            Width = 200,

            Height = 200

        };

        var b = ToPercentage(a);

        var c = ToPercentage(b);

        Console.WriteLine(b.X + "," + b.Y + "," + b.Width + "," + b.Height);

        Console.WriteLine(c.X + "," + c.Y + "," + c.Width + "," + c.Height);

        b.Height /= 2; // 2* the size

        b.Width /= 2; // 2 * the size

        // or to make it smaller just do *= X (2 = half the size)

        c = ToPercentage(b);

        Console.WriteLine(b.X + "," + b.Y + "," + b.Width + "," + b.Height);

        Console.WriteLine(c.X + "," + c.Y + "," + c.Width + "," + c.Height);

    }

    public static Rectangle ToPercentage(Rectangle rect) {

        return new Rectangle {

            X = rect.X,

            Y = rect.Y,

            Width = 100 / rect.Width,

            Height = 100 / rect.Height

        };

    }

    public static Rectangle ToProjection(Rectangle rect) {

        return new Rectangle {

            X = rect.X,

            Y = rect.Y,

            Width = rect.Width * 100,

            Height = rect.Height * 100

        };

    }

}