How to create percentiles for pre-aggregated data with 'TotalTime', and a 'UnitCount'

[Tdawg90]

Hi, 

We do a fair amount of aggregation prior to pulling it into power bi.  

The data table looks something along the lines of 

ReportDate	Pivot Field	Pivot field	UnitCount	TotalTime
7/15/2021	b	a	23	455
7/15/2021	a	a	12	2148
7/16/2021	s	d	12	21
7/17/2021	d	d	4	54
7/17/2021	d	s	4	46

I have a Measure to report on the average

Avg Minutes = SUM([TotalTime]) / SUM([UnitCount])

and a few percentiles

80th Percentile Avg Time = PERCENTILEX.EXC(myTable, [Avg Minutes], .80)
80th PercentileTime = PERCENTILE.EXC(myTable[TotalTime], 0.8)

However I need the percentiles to leverage the unit counts, rather than, I think it's using the row count?

Can this be done directly utilizing these methods?

[v-yangliu-msft]

Hi  @Tdawg90 ,

Can you describe your expected result through your sample data.

Best Regards,

Liu Yang

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