One way is to define your data as a dynamic range e.g. List

Insert=Name=Define

Enter "List" as name (for example)

In the Refers To box, enter an Offset formula that defines the range size,
based on the number of items in the column, e.g.:
=OFFSET(Sheet1!$A$2,0,0,COUNTA(Sheet1!$A:$A),1)
In this example, the list is on Sheet1, starting in cell A2

For your calculation put this in the required cell:

=OFFSET(A2,ROWS(List)-1,0)/(A2)

This divides last number in range "List" by first

HTH

"jezzica85" wrote:

Hi all, I have a spreadsheet like this:
3000
4000
5000
6000

I want to divide the last number by 3000, and only the last number. If I
add another number on after the last one, say 7000, I want to divide that
one, and only that one. Is there a way to do that?
Thanks!