Regional Trend minus National Trend

[evpote01]

Hello!

I am trying to find the difference between regional and national trends for different components. For example,

Region	Allowed Dollars for Flu	Trend Denominator
North	5	10
South	23	473
East	46	5789
West	24	1238

I created a measure by doing Allowed Dollars for Flu divided by the trend denominator. So the trend for North would be 5/10 = 50%

I want to be able to take that trend for North (and every other region) and subtract the national trend (which would be (5+23+46+24)/(10+473+5789+1238) = ~13% so that for North you would have 50% - 13% = 37% and display it in a table like this:

Region	Difference From National Trend
North	37%
South	-8.14%
East	-12.2055%
West	-11.1%

 (the above difference values are just approximations, not exact). All of the values will change based on different slicers I have on my dashboard (ex. year) so I can't just have a static national trend that I reference.

[Jihwan_Kim]

Diff from National Trand =
VAR regiontrend =
SUMX ( Data, Data[Allowed Dollars for Flu] / Data[Trend Denominator] )
VAR nationaltrend =
CALCULATE (
SUM ( Data[Allowed Dollars for Flu] ) / SUM ( Data[Trend Denominator] ),
REMOVEFILTERS ( Data[Region] )
)
RETURN
regiontrend - nationaltrend

[parry2k · Accepted solution]

@evpote01 add 3 measures and you are good to go:

Region Trend % = DIVIDE ( SUM ( 'Trend'[Allowed Dollars for Flu] ), SUM ( 'Trend'[Trend Denominator] ) )

National Trend % = CALCULATE ( [Region Trend %], ALLSELECTED () )

Difference From National Trend = [Region Trend %] - [National Trend %]

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