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decimal xint = 0.777777M;
xint = xint*10000;
xint = Math.Floor(xint);
xint = xint/10000;
Console.WriteLine(xint .ToString ("P2"));
decimal num = Convert.ToDecimal(0.77777777*10000);
num = decimal.Floor(num) / 100;
Console.WriteLine(num + "%");
Console.Read();double x = 0.77777777;
string s = ((int)(x * 10000) / 10000.0).ToString("P2");