Try this
Code:
Sub SaveCurrentAndPreviousSheetToNewWorkbook()

    Dim wbk As Workbook
    Dim wbkActive As Workbook
    Dim lngSheetsDefaultCount As Long
    
    Set wbkActive = ActiveWorkbook
    If ActiveSheet.Index < 2 Then
        MsgBox "There are no previous sheets before the current sheet!", vbInformation
        Exit Sub
    End If
    lngSheetsDefaultCount = Application.SheetsInNewWorkbook
    Application.SheetsInNewWorkbook = 2
    Set wbk = Workbooks.Add
    Application.SheetsInNewWorkbook = lngSheetsDefaultCount
    wbkActive.ActiveSheet.UsedRange.Copy wbk.Sheets(2).Cells(1)
    wbkActive.ActiveSheet.Previous.UsedRange.Copy wbk.Sheets(1).Cells(1)
    wbk.SaveAs wbkActive.Path & Application.PathSeparator & "Statement As On " & FormatDateTime(Date, vbLongDate)
    
End Sub