public class Ex10PercentEven {

	public static double percentEven(int[] list) {
		int count = 0;
		for (int n : list) {
			if (n % 2 == 0) {
				count++;
			}
		}
		return (double)count / list.length * 100.0;
	}
	
	public static void main(String[] args) {
		int[] list = { 6, 2, 9, 11, 3 };
		System.out.printf("%1.2f", percentEven(list) );
	}

}