public static void Main()
double sum, m_umsatz_in_prozent;
double[] m_umsatz = new double[13];
for (i = 1; i <= 12; i = i + 1)
Console.WriteLine("Gib Monatsumsatz");
m_umsatz[i] = double.Parse(Console.ReadLine());
for (i = 1; i <= 12; i = i + 1)
m_umsatz_in_prozent = (100 * m_umsatz[i]) / sum;
Console.WriteLine(i + " " + m_umsatz[i] + " " + m_umsatz_in_prozent);