static void Main(string[] args) { Rational x = new Rational(); Rational y = new Rational(3); Rational w = new Rational(9, 8); Rational z = new Rational(4, 7); Console.WriteLine("So, we have created the 4 rational objects.\n"); Console.WriteLine($"a:{x}, b:{y}, c:{w}, d{z}\n"); x.IncreaseBy(w); Console.WriteLine($"If we add a nd c the result is {x}.\n"); z.DecreaseBy(w); Console.WriteLine($"If we subtract d nd c the result is {z}.\n"); }