calculation

[v-yalanwu-msft · Accepted solution]

Hi, @razan_5r5 ;

Please try it.

Percent = 
var _count30= CALCULATE(COUNT('Table'[patients]),FILTER(ALL('Table'),DATEDIFF([appointment time],[time seen],MINUTE)>30))
return DIVIDE(_count30,COUNTX(ALL('Table'),[patients]))

The final output is shown below:

Best Regards,
Community Support Team_ Yalan Wu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[razan_5r5]

i do not understand this step 

 1/24/60 * 30),1,0)

[bcdobbs]

Under the surface a whole day has a numeric value of 1 which is why date+1 gives you'd the following days date.

1/24/60 is the decimal equivalent of 1 minute. 1 day divided by 24 hours divided by 60.

Multiplying that by 30 gives decimal equivalent of 30 minutes.

Finally the of statement returns 1 if the wait time was greater than 30 minutes and 0 otherwise. You can then sum that column in a power bi visual to give a count.

[Greg_Deckler]

@razan_5r5 So, generally you could do something like:

IF ([Time seen by physician] - [Appointment Time] > 1/24/60 * 30),1,0)

If that doesn't help, Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.