Need help to create a fixed denominator to calculate %

[Anonymous]

Hi, 

I have this data and this is how 1 enrollment looks like:

From this dataset, I created a chart with the absolute value like this. Basically, this is to see if all of the students join in 2020-01 stay with the learning center for how long and how many of them are left after a period of time. The Cohort Rank is the order of the month that the students are still staying with us.

What I am trying to do is to turn this into Percentage. But I really struggle with making the denominator to be fixed ( the first row). For example for Cohort 2020-01, I need all of the months after that to divide by 521. I tried to filter the Denominator with the Cohort rank =1 but I get nothing for the 2nd month afterward. So I only get 1st month 100% and infinity after that T.T

For example for 2020-01: I need the 1st month to be 100%, the 2nd month is 518/521 = 99% and 3rd month 514/521. 

I really need help with this!!!

Thanks a lot and I really appreciate your help. 

[Icey]

Hi @Anonymous ,

Try this:

Percent = 
VAR Denominator =
    CALCULATE ( [Numerator], Cohort[Cohort Rank] = 1 )
RETURN
    DIVIDE ( [Numerator], Denominator )

Best Regards,

Icey

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[FrankAT]

Hi @Anonymous 

with an excerpt of your sample data:

Percentage  to Cohort Rank 1 = 
VAR _Denominator = CALCULATE(VALUES('Table'[2020-01]),'Table'[Cohort Rank] = 1)
RETURN
    DIVIDE(SUM('Table'[2020-01]),_Denominator)

With kind regards from the town where the legend of the 'Pied Piper of Hamelin' is at home
FrankAT (Proud to be a Datanaut)

[Anonymous · Accepted solution]

Hi @FrankAT, 

My Numerator is actually not a column. I am trying to do a measure for this. 

This is the measure that I use for the Numerator = DISTINCTCOUNT( Cohort[ENR ID (Product + ST IDs)])

So I am having my 

VAR Numerator = DISTINCTCOUNT( Cohort[ENR ID (Product + ST IDs)])

And I need a

VAR Denominator = the fixed number for "cohort rank =1" from the numerator above

I hope you understand my explanation 😅