i have designed the crystal report. then i wrote the formulate for percentage which is working fine. I want to show percentage of each students R-01, R-02 and R-03 based on their obtaining marks.i put the percentage in the Group Footer # 1 along with obtaining and total marks. problem is that it is showing the same percentage.

i wrote the following formula  (SUM({tblSetMarks.Mark})*100)/SUM({tblSetMarks.Max})

how to fix it? 

Code :

private void btnTest_Click(object sender, EventArgs e)
{
    try
    {
        ReportDocument report = new ReportDocument();
        report.Load(@"E:\AB-Reports\AB\rptTests.rpt");
        report.SetDataSource(sTable);
        report.SetDatabaseLogon("sa", "2005");
        crystalReportViewer1.ReportSource = report;
        crystalReportViewer1.DisplayToolbar = true;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }
}