Finding the correct result for a % sum

You can use a combination of a form variable (to calculate the Partner Price) and a form rule (to display to final Partner Price). Below is how I was able to accomplish this.

1. Create fields for List Price (Currency type), Partner Discount (Number type with decimal), and Partner Price (Currency type).
2. Create a Form Variable to calculate the Partner Price with these settings:
     - Name = decPartnerPrice
     - Type = Decimal
     - Value =   Form.List Price * (1-(Form.Partner Discount/100))
3. Create a form rule with these settings:
     - Name = Calculate Partner Discount
     - If “List Price” Is filled AND “Partner Discount” Is filled
     - Then “Partner Price” Value decPartnerPrice
     - Else “Partner Price” Value 0.00
4. Test it out in the Preview tab.

Looks like @brent_read beat me to the punch.

@bamaeric 

Yeah, but your response was much more thorough 😀