I recently did a bit of work in Power BI and came across this issue :
An unsightly (Blank) being displayed whenever a numeric value is zero.
What you really want of course is to see a 0 when it is zero. I put up with it for a while but eventually had to look for a solution.
I experienced this in particular when narrowing a date range filter, so I have used that as an example here.

How to fix the (Blank)? Use a measure.
My table name in this example is called ‘Quick Books’.
Add a new measure (Power Query) to the table and include the field name that has the (Blank) value – in this case ‘Credit’.

The Power Query code I use
Measure name = IF(
ISBLANK(COUNT('Quick Books'[Credit])),
0,
COUNT('Quick Books'[Credit]))
Create a new measure in your table via the ‘New Measure’ button.
This by default calls the measure name ‘Measure Name’ and it shows up as a field in your field list on the right-hand side.

And of course change to use your own field names
Replace ‘Measure name’ with your own name.
Replace ‘Quick Books’ with your table name.
Replace ‘Credit’ with your field name.
Save/Commit the measure
Click on the tick next to the measure to commit.
You can always return to edit it by clicking on the field/measure name in the field list.

Replace original field with the measure

To actually get it to use the new measure select the ‘Numeric Value’ visual and replace the original field name (Credit) with the measure (Measure name)

As expected when we increase the date range the correct values are still displayed:
