C#

I have a multidimensional array and I would like to fill just a percentage of it with 0's and 1's. I currently have a for loop that fills the array 100% is there a way to just fill like 50% or 30% or a way to control how many numbers do I put in?????

Random rng = new Random();

int [,] array = new int[50,100]; for (int i = 0; i < array.GetLength(0); i++) { for (int j = 0; j < array.GetLength(1); j++) { array[i, j] = rng.Next(2); } }