Comparing semi-additive calculations as a % change

[Anonymous]

I followed the excellent Semi Additive mesure guide at sqlbi.com (https://www.sqlbi.com/articles/semi-additive-measures-in-dax/) and now have a report that tracks balences accurately and the measure reports the most recent balance of the quarter. 

LastBalance Ever :=
VAR MaxDate =
MAX ( 'Date'[Date] )
VAR LastDates =
ADDCOLUMNS (
CALCULATETABLE (
VALUES ( Balances[Name] ),
ALL ( 'Date' )
),
"LastDay", CALCULATE (
MAX ( 'Balances'[Date] ),
ALL ( 'Date' ),
'Date'[Date] <= MaxDate
)
)
VAR LastDatesWithLineage =
TREATAS (
LastDates,
Balances[Name],
'Date'[Date]
)
VAR Result =
CALCULATE (
SUM ( Balances[Balance] ),
LastDatesWithLineage
)
RETURN
Result

I'm now keen to understand how I would compare changes between the most recent balence and the previous most recent balence. For example;

Supplier	Contract Spend	Effective Date	Change
A	10,000.00	01/01/2019	0%
A	15,000.00	01/01/2020	150%
A	10,000.00	02/01/2021	67%

Is there a DAX command that would allow me to compare with the previous last balence? Any ideas on how I could approach this?

[Anonymous · Accepted solution]

@Anonymous Please refer to my measure for this sample data:

Measure = MAX('Table'[Contract Spend]) / CALCULATE(MAX([Contract Spend]),FILTER(ALL('Table'),[Supplier]=MAX('Table'[Supplier]) && [Effective Date]<MAX([Effective Date])))

Updating Media

Paul Zheng _ Community Support Team
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