Syntax to divide form values and update table as percentage with 2 decimals; close form and open another form

The following is the VBA code I wrote to update a table from a form.  I have two questions.

First I want to divide the form entries:

Me.txtXM / Me.txtTM and update the table field XMPERC as a Percentage with 2 decimal places.

Second I need to close the open form frmSR1 and reopen frmEvalMenu.

What is the syntax for this?

Private Sub Command27_Click()
 'Update tbl_SR1 with Blood Data
     Dim db As DAO.Database
     Dim rs As DAO.Recordset
     
     Set db = CurrentDb
     Set rs = db.OpenRecordset("tbl_SR1", dbOpenDynaset)
     
     rs.AddNew
     rs.Fields("ProviderID") = Me.Text16
     rs.Fields("XM") = Me.txtXM
     rs.Fields("TX") = Me.txtTX
     
     rs.Fields("RptDate") = Me.Text20
     rs.Fields("XMPERC") = Format(Me.txtXM / Me.txtTX, "000.00")
     
     rs.Update
     
     rs.Close
     
     Set rs = Nothing
     
     'Clear All Selections and Return to Physician Evaluation Menu
     
     DoCmd.Close acForm, "frm_SR1"
     
 End Sub

thanks

Glen