# Power BI | Introduction to DAX exercise | Use the CALCULATE function to show premier league ratios

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

You can learn how to do this exercise on the relevant Wise Owl classroom training course (sadly for the moment only in the UK).

 Software ==> Power BI  (92 exercises) Version ==> Latest update Topic ==> Introduction to DAX  (3 exercises) Level ==> Average difficulty
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

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Create a new Power BI file, and load both tables from the Excel workbook in the above folder.

Create the following table (eventually!).  There are notes on how to create each of the columns below it.

You'll need to use measures for the last two columns.

The first 3 columns are straightforward: just summarise by the manager's nationality and show the sum of points teams of this nationality have scored, together with the number of teams per nationality.

The proportion of total points is a ratio between the following two figures:

Part of ratio Calculation
Numerator The total points won (use a simple SUM function)
Denominator The total points won for teams of all nationalities (combine a CALCULATE function with the ALL function, to remove any nationality constraint)

You can do all of this in a single measure, but you may find it easier to create two separate measures and then create a third measure dividing one by the other.

The ratio of total points won for a nationality to total points won by English managers is given by these figures:

Part of ratio Calculation
Numerator The total points won (use a simple SUM function)
Denominator The total points won by English teams (replace the nationality constraint for any filter context with one which says that the nationality must be England).

If you finish all this, save this file as We miss Alex, and close it down.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.