Scoring each prerequisite is like scoring math at 38 and language at 42. You’ll get an average score of 40 there.
“to be more precise” means that you could get a more accurate score by the ones place. If we go on by the points system model rn we might a few points away than if were to be more precise I think.
I don’t think we need to be more precise with the prerequisites’ score cuz I think that’s local optima. You’ll still be able to explain to the reader your main idea.