Let's put the drop down in column A and the data to be formatted in column B.
Enter the following in the worksheet code area:

Private Sub Worksheet_Change(ByVal Target As Range)
Dim A1 As Range, B As Range
Set A1 = Range("A1")
Set B = Range("B:B")
If Intersect(Target, A1) Is Nothing Then Exit Sub
Application.EnableEvents = False
If A1.Value = "proportional" Then
B.NumberFormat = "0.00%"
Else
B.NumberFormat = "General"
End If
Application.EnableEvents = True
End Sub


Because it is worksheet code, it is very easy to install and automatic to use:

1. right-click the tab name near the bottom of the Excel window
2. select View Code - this brings up a VBE window
3. paste the stuff in and close the VBE window

If you have any concerns, first try it on a trial worksheet.

If you save the workbook, the macro will be saved with it.


To remove the macro:

1. bring up the VBE windows as above
2. clear the code out
3. close the VBE window

To learn more about macros in general, see:

http://www.mvps.org/dmcritchie/excel/getstarted.htm

To learn more about Event Macros (worksheet code), see:

http://www.mvps.org/dmcritchie/excel/event.htm

--
Gary''s Student - gsnu201002


"michelle439731" wrote:

Good afternoon,

I have an array of numbers in excel. I want then to display as percentage
if I've selected "proportional" from a drop down menu. I want them to
display as a number (0.00 for example) if I select "absolute" these are the
only two options in the menu.

I'ved tried using the Format code help in Excel but I can't manuipulat it to
get it to work how I want.

Any help will be greatly apprecaited.

Thank you!

Michelle