Calculate Percentage with MDX Help

Hi there, 

I'm kinda new to MDX and I have these requirements to get the percentage from close/open tickets

I have these two separated MDX queries that extract open and close tickets respectively;

Open Tickets

SELECT NON EMPTY ([Date - Created].[Week].[Week Name].ALLMEMBERS, [Measures].[Weekly Count]) ON COLUMNS,
NON EMPTY [Ticket - Maintenance].[Site].ALLMEMBERS ON ROWS
FROM [CubeX]
WHERE ([Ticket - Status].[Code].&[OPEN])

Close Orders

SELECT NON EMPTY ([Date - Created].[Week].[Week Name].ALLMEMBERS, [Measures].[Weekly Count]) ON COLUMNS,
NON EMPTY [Ticket - Maintenance].[Site].ALLMEMBERS ON ROWS
FROM [CubeX]
WHERE ([Ticket - Status].[Code].&[CLOSE])

Now how do I combined both weekly counts by week in order to get a percentage CLOSE/OPEN * 100? is possible

Let me know if I'm making sense please.

Thanks for you help.