Need help to determine the % of the days in the month "used"

[jfowings1]

I'm new to power bi and thankful for this community!  I need to create a kpi card that shows how many days have gone by for the current month, shown as a percentage.  Math wise, this is easy.  Today is the 23rd and there are 31 days in the month.  So 22 days have gone by.  22/31 = 70.9%.  I cannot, for the life of me, create the measure to show in the KPI card.  In my date table, I have a measure that shows the number of days in the month.  I created a mesaure that shows yesterday's date. (Now()-1) since I do not want to count today.    I've tried simple division and I get 1% because they want to "count" each measure.  I've tried co-pilot and I got 124%.  Can someone show me what I need, or what I'm doing wrong?  Thanks so much - this forum has been soooo helpful!

[jfowings1]

Thank you so much!  This did it!  The first day is actually around 3%

[lbendlin]

No, it's not. Since you are looking at the day before, on the first day you will get 0%.

[jfowings1]

Correct.  

[lbendlin · Accepted solution]

What should be the result on the first day of a month?

Measure = 
var lastmonth = EOMONTH(TODAY(),-1)
var thismonth = EOMONTH(TODAY(),0)
return divide(TODAY()-lastmonth-1,thismonth-lastmonth,0)