SSAS MDX calculation - ssas

Question

I need a calculated measure(SSAS MD) to calculate the percentage of count values.
I have tried below expression but I did not get the desired output.Let me know if I missing anything and I want to calculate the percentage of the age for the group by the car total:
( [DimCar].[Car], [DimAge].[Age], [Measure].[Count])/
sum([DimCar].[Car].[All].children), ([DimAge].[Age].[All], [Meaures].[Count])}*100
Below are the sample date values in cube:
Car Age Count
----- ----- -----
Benz 1 2
Camry 37
Honda 1 18
Honda 6 10
Expected output:
Car Age Count Percent TotalCount
----- ----- ----- ------ ----------
Benz 1 2 100% 2
Camry 37 100% 37
Honda 1 18 64.28% 28
Honda 6 10 35.71% 28
Forumula to calculate percentage:
18/28*100 =64.28%
10/28*100 =35.71%
Honda 1 18 64.28% 28
Honda 6 10 35.71% 28

Answer 1

with Member [Measures].[Total Sales Count]
as iif (isempty([Measures].[Sales]),NUll, sum([Model].[Modelname].[All].children ,[Measures].[Sales]))
Member [Measures].[Total Sales%]
as ([Measures].[Sales]/[Measures].[Total Sales Count]),FORMAT_STRING = "Percent"
select {[Measures].[Sales],[Measures].[Total Sales Count],[Measures].[Total Sales%]
}on 0
,non empty{[Car].[Carname].[Carname]*[Model].[Modelname].[Modelname]} on 1
from [Cube]
Output :
Car Model Sales Total Sales Count Total Sales%
Benz New Model 2 2 100.00%
Camry Old Model 37 37 100.00%
Honda New Model 18 28 64.29%
Honda Top Model 10 28 35.71%
Instead of "Age" attribute I have added "Model" dimension.
Below code get exact output which is expected.
enter image description here

Answer 2

My understanding is that for a particular car example honda, you want to divide by the total honda's irrespective of their Age. In this case 28. So for Age:six honda you use 10/28. Where as for Benz, since all Benz are Age: 1 you use 2.
Use the following code
Round(
(
( [DimCar].[Car].currentmember, [DimAge].[Age].currentmember, [Measure].[Count])
/
([DimCar].[Car].currentmember,root([DimAge]),[Measure].[Count])
)*100
,2)
Below is a similar example on adventure works
with member
measures.t as
(
( [Product].[Category].currentmember, [Delivery Date].[Calendar Year].currentmember, [Measures].[Internet Order Quantity])
/
([Product].[Category].currentmember,root([Delivery Date]),[Measures].[Internet Order Quantity])
)*100
select {[Measures].[Internet Order Quantity],measures.t}
on columns ,
non empty
([Product].[Category].[Category],[Delivery Date].[Calendar Year].[Calendar Year])
on rows
from [Adventure Works]