Does this happen to you?
In two of my classes, everything is graded by %. Example: 6 exams worth 50%, paper worth 20%, homework 20% and attendance 10%. So my total grade is based on the sum of percents.
Then they give extra credit. How do the extra points get credited? Are they added to an exam? Or if 60% = 60 points… then is each extra credit point 1% of my grade?!