双值计算中的一些基本错误

我有一个让我困惑的小问题，我有一个名为RevisionRatio的double类型变量，我在其中使用这个表达式。

RevisionRatio = ((WriterRevisions/TotalRevisions) *100)现在让我们考虑WriterRevisions = 5和TotalRevisions = 11，所以它使((5/11)*100)= 45.45%，但由于某种原因它一直给我0，我知道我正在做一些小错误，我似乎无法在谷歌上找到它，你的帮助是非常感激的，这是我的代码。

    protected void MyMonthlyRevisionRatio(bool DateSpecified)
{
    int TotalRevisions = 0;
    int WriterRevisions = 0;
    double RevisionRatio = 0;
    using (LogiConnection = new SqlConnection(CIPConnection))
    {
        LogiConnection.Open();
        DateTime DT = DateTime.Now;
        using (LogiCommand = new SqlCommand(Functions.NewString("SELECT COUNT(DISTINCT LCR.revision_id) AS revisions FROM LogiCpsRevisions AS LCR INNER JOIN LogiCpsLogs AS LCL ON LCL.project_id = LCR.project_id WHERE (DATENAME(mm, GETDATE()) = DATENAME(mm, LCL.creation_date))"), LogiConnection))
        {
            LogiCommand.Parameters.AddWithValue("@writer_id", HFSqlParameters.Value);
            TotalRevisions = Convert.ToInt16(Functions.GetResults(LogiCommand)[0]);
        }
        if (DateSpecified)
        {
            using (LogiCommand = new SqlCommand(Functions.NewString("SELECT COUNT(DISTINCT LCR.revision_id) AS revisions FROM LogiCpsRevisions AS LCR INNER JOIN LogiCpsLogs AS LCL ON LCL.project_id = LCR.project_id WHERE (LCL.writer_id = @writer_id) AND (DATENAME(mm, GETDATE()) = DATENAME(mm, LCL.creation_date)) AND (creation_date BETWEEN @FromDate AND @ToDate)"), LogiConnection))
            {
                LogiCommand.Parameters.AddWithValue("@writer_id", HFSqlParameters.Value);
                LogiCommand.Parameters.AddWithValue("@FromDate", FromDtPicker.SelectedDate);
                LogiCommand.Parameters.AddWithValue("@ToDate", ToDtPicker.SelectedDate);
                WriterRevisions = Convert.ToInt16(Functions.GetResults(LogiCommand)[0]);
                RevisionRatio = ((WriterRevisions / TotalRevisions) * 100);
                lblMyRevisionRatio.Text = "7. Revision ratio : " + RevisionRatio + "in the given period.";
            }
        }
        else
        {
            using (LogiCommand = new SqlCommand(Functions.NewString("SELECT COUNT(DISTINCT LCR.revision_id) AS revisions FROM LogiCpsRevisions AS LCR INNER JOIN LogiCpsLogs AS LCL ON LCL.project_id = LCR.project_id WHERE (LCL.writer_id = @writer_id) AND (DATENAME(mm, GETDATE()) = DATENAME(mm, LCL.creation_date))"), LogiConnection))
            {
                LogiCommand.Parameters.AddWithValue("@writer_id", HFSqlParameters.Value);
                WriterRevisions = Convert.ToInt16(Functions.GetResults(LogiCommand)[0]);
                RevisionRatio = ((WriterRevisions / TotalRevisions) * 100);
                //Response.Write(TotalRevisions);
                //Response.Write(WriterRevisions);
                //Response.Write(RevisionRatio.ToString());
                lblMyRevisionRatio.Text = "7. Revision ratio : " + RevisionRatio + " in the month of " + DT.ToString("MMMM") + ".";
            }
        }
    }
}

谢谢。

int TotalRevisions = 0;     
int WriterRevisions = 0; 

double TotalRevisions = 0;     
double WriterRevisions = 0; 

double x1 = 1 / 2; // x1 == 0
double x2 = 1.0 / 2; // x2 = 0.5

RevisionRatio = ((WriterRevisions * 1d / TotalRevisions) * 100);