Input of roof pitch as a percentage in the 'Edit Global Parameters' dialog

Good day,
I have a small problem with the dialog "Edit Global Parameters" (RFEM6). Specifically, I want to enter the roof pitch not as an angle but as a percentage. Unfortunately, I cannot find a suitable unit for percentage in the "Unit Group" column. Could you please help me with this?
Attached is the image:

Good day,

You could use a separate input parameter (Dach_pro), convert it from percent to degrees using a formula, and use an output parameter for the converted value.

Best regards,
Matthias Meyer