Should total percentage be shown as negative or 0 in case total marks are negative?

I have an application which shows total marks and percentage scored by the student in a paper. All questions are multiple choice questions, so to avoid guessing by students negative marks for wrong answer are put in place

Also there are graphs that show in each section of the paper, the marks and percentage scored by the student.

So my doubt is in case the student scores negative marks (overall score is negative or negative marks in a particualr section), should I show the percentage as negative or show it as 0.

Ex: Candidate score and percentages ->

Section 1 -> 4/10, 40%

Section 2 -> -5/10, <-50% or 0% ?>

Total -> -1/20, <-5% or 0% ?>