Divide monthly sum by value per month

[Anonymous]

Hello,

I have a table of expenses:  Date / Category / Amount

I have a separate table with the average monthly headcount for each month:  Month / Headcount

I would like a measure which sums the expenses for a particular month, and divides it by the headcount for same month from the other table to give average expenses per headcount.

Ideas?

Thank you,

Stacey

[Anonymous · Accepted solution]

You can use the following formula:

Average Headcount Expenses = 

DIVIDE(SUMX(Expenses, Expenses[Amount]), SUMX(Headcount, Headcount[headcount]))

As long as you have proper date columns in each table that are linked to a date table, and you use the months as the axis, this formula should do what you need it to do. 

[Anonymous]

Thank you for your reply, @Anonymous.  When I tried the formula, it divided by the sum of all headcount, rather than the amount per month.  Here are the structures of my tables.  Do I need to change the format of the tables?

Thank you,

Stacey

[Anonymous]

I do also have a separate date table which is linked to both the Expenses and Headcount tables.

[Anonymous]

And you used the months column from your date dimension table as the axis?

[Anonymous]

That was the problem!  Thank you!