Percentage Change showing incorrectly

[Anonymous]

I am having a problem showing the percentage change for when both values are 0. For example, if my figure for 2020 was 0, and my figure for 2021 was 0. I would want my % change visual to show 0% - as there has been no change. However it is showing -100%. This only affects figures where they are both 0, it works perfectly if both figures are 1 and it would show 0% change.

Below is my measure i'm using - could anyone advise as to why this could be happening?

% Vic Change =

DIVIDE(

CALCULATE(

DISTINCTCOUNT('Fact Incident'[Victim ID]),

FILTER('Date','Date'[Fiscal Year]=MAX('Date'[Fiscal Year])

)

),

CALCULATE(

DISTINCTCOUNT('Fact Incident'[Victim ID]),

FILTER('date','Date'[Fiscal Year]=MIN('Date'[Fiscal Year])))

,0)

- 1

As you can see in the screenshot below, i have two figures of 0 and the % change is showing as -100%:

[vivran22]

Hello @Anonymous 

I believe you need to modify the formula:

% Vic Change =
VAR _Num = 

    CALCULATE (
        DISTINCTCOUNT ( 'Fact Incident'[Victim ID] ),
        FILTER ( 'Date', 'Date'[Fiscal Year] = MAX ( 'Date'[Fiscal Year] ) )
    )
VAR _Den = 
    CALCULATE (
        DISTINCTCOUNT ( 'Fact Incident'[Victim ID] ),
        FILTER ( 'date', 'Date'[Fiscal Year] = MIN ( 'Date'[Fiscal Year] ) )
    )
    
VAR _PercentChange = IFERROR(_Num/_Den - 1,0)
RETURN
_PercerntChange

Cheers!
Vivek

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[Anonymous]

Hi @vivran22 thanks for this. Unfortunately the end result is the same  = -100%.

[vivran22 · Accepted solution]

@Anonymous 

Mathematically, the correct formula for calculating difference from previous year is:

(Cur Year - Prev Year)/Prev Year

Based on that, you should modify your formula:

% Vic Change =
VAR _Num = 

    CALCULATE (
        DISTINCTCOUNT ( 'Fact Incident'[Victim ID] ),
        FILTER ( 'Date', 'Date'[Fiscal Year] = MAX ( 'Date'[Fiscal Year] ) )
    )
VAR _Den = 
    CALCULATE (
        DISTINCTCOUNT ( 'Fact Incident'[Victim ID] ),
        FILTER ( 'date', 'Date'[Fiscal Year] = MIN ( 'Date'[Fiscal Year] ) )
    )
    
VAR _PercentChange = IFERROR((_Num-_Den)/_Den ,0)
RETURN
_PercerntChange

Note: You may want to assign appropriate variable names.

Cheers!
Vivek

If it helps, please mark it as a solution
Kudos would be a cherry on the top 🙂 (Hit the thumbs up button!)
If it doesn't, then please share a sample data along with the expected results (preferably an excel file and not an image)


https://www.vivran.in/

Connect on LinkedIn

[Anonymous]

@Anonymous You can add third parameter (write there 1) in DIVIDE function (what function returns when there is dividing by zero).

[Anonymous]

Hi @Anonymous , how would this look inside my current measure please? Thanks

[Anonymous]

% Vic Change =

DIVIDE(

  CALCULATE(

    DISTINCTCOUNT('Fact Incident'[Victim ID]),

    FILTER('Date','Date'[Fiscal Year]=MAX('Date'[Fiscal Year])

    )

  ),

  CALCULATE(

    DISTINCTCOUNT('Fact Incident'[Victim ID]),

    FILTER('date','Date'[Fiscal Year]=MIN('Date'[Fiscal Year])

    )

  )

,1)

- 1

[Anonymous]

That has gave the same result as mine did @Anonymous = -100%