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GoingIncognito's avatar
GoingIncognito
Icon for Advocate III rankAdvocate III
6 years ago
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How to save percentage as a variable in DAX

Hi. My question is simple: How do I save a percentage as a variable in DAX? In order to count Sharpe's ratio I'd need to perform a following calculation: Profit - (-0,25%) / volatility. How do I sa...
  • Anonymous's avatar
    Anonymous
    6 years ago

    I think you need to understand a bit more about how percentages are saved, so here we go.
    When a percentage is saved in Power BI it is saved as a decimal number (0,75) = 75%. When you select the modeling as percentage power bi is very smart and knows you want to see 75%. So it does that for you. 
    When calculating tho you would (most of the cases) use 0.75. Because if i want to calculate 75% of 1000 i can do 1000*0.75=750.
    hence he said you might want to do it *100. (0.75*100=75%)


    So to get back to your initial question when you save a measure with -0.25 and make it a percentage. The percentage is -25%. Calulating with -0.25% would be -0.0025.

    i hope this helps 🙂