MDX query for percent of current row within table - powerbi

Question

I have an SSAS cube with a FactTicket, that has a TicketsSold measure.
The cube has a good number of dimensions. Lets call them Date, Agent and Geo.
I can create a table (we're using Power BI service, if it makes a difference) and put in it all and any dimensions, and the TicketsSold measure.
What I'd like to do, is have another measure that'll calculate the percent of each row in the table out of the total of the table at that moment.
so suppose I have the following data:
Date Agent Geo TicketsSold
2020-04-01 Moulder US 12
2020-04-01 Moulder UK 4
2020-04-02 Moulder US 10
2020-04-03 Moulder UK 5
2020-04-01 Skully US 16
2020-04-01 Skully UK 12
I would like to be able to filter my report on any measure, display any other measure(s) with the TicketsSold and the percent.
Such as, filtered on 2020-04-01 and 2020-04-02:
Agent Geo TicketsSold %ofTicketsSold
Moulder US 22 40.74 %
Moulder UK 4 7.40 %
Skully US 16 29.63 %
Skully UK 12 22.22 %
TOTAL 54 100 %
Or filtered only on Agent Moulder:
Date TicketsSold %ofTicketsSold
2020-04-01 16 51.61 %
2020-04-02 10 32.26 %
2020-04-03 5 16.13 %
TOTAL 31 100 %
It's clear to me that what I probably need is some way of getting -- for each row in the table -- the total of the table itself, and then dividing the row's own TicketsSold by this total.
But I can't seem to figure out a trivial way of creating such a calculation. Is this doable, without having to define a tuple of all possible dimensions?
Thanks!

Answer 1

You can achive that using the axis function . Below is an example based on Adventureworks
where we will create a PercentageOFTotal Column based on InternetSales
select
{[Measures].[Internet Sales Amount]}
on columns,
non empty {([Product].[Category].[Category],[Product].[Subcategory].[Subcategory])}
on rows
from
[Adventure Works]
where [Date].[Calendar Year].&[2013]
Result
Now lets add our new column
with member measures.PercentageOFTotal
as round(([Measures].[Internet Sales Amount]/sum(Axis(1),[Measures].[Internet Sales Amount]))*100,2)
select
{[Measures].[Internet Sales Amount],measures.PercentageOFTotal }
on columns,
non empty {([Product].[Category].[Category],[Product].[Subcategory].[Subcategory])}
on rows
from
[Adventure Works]
where [Date].[Calendar Year].&[2013]
Result

Answer 2

If you are already using PBI: why don't you make use of DAX? A DAX query is able to solve your problem: MEASURE Fact[Percent] = CALCULATE(SUM(Fact[Amount]), ALLSELECTED(Fact)). "ALLSELECTED" is similar to VISUALTOTALS() in MDX, but more dynamic.