calculation in matrix

[schans11]

Hi,

I am currently trying to calculated weeks of supply in a Power BI matrix. This goes well for the lowest level (green, 201/7), but not for the aggregate level (red, 35828/2461). 

Which function should I use to do this?

I am currently using the below function.

[FreemanZ]

hi @schans11 

why not using the [weeks supply] measure in the last column of your second screeshot ?