Assigning values to Part #'s

[Drece-gkn]

Hello, 

I have a chart visualization that I need to add a column to. I have a column that has part numbers and I need to add a new column that assigns a % value to each distinct part number. 

For Example. 

part number A = 2%

part number B=4% 

Can any help me figure this out? Thanks!

[MatheusC]

@Drece-gkn 

Do you want to bring how much (%) the number of pieces represents?
Imagining that's it, try the expression with the total  qualifier adapted to your model.

Count(distinct [field-parts])
/
Count (distinct total [field-parts])

Att,
Matheus