@MalenaM
@nwilson7 clarified my confusion.
So you have a quiz that has a number of questions worth 1 point each. You made the Quiz worth 100 points. (quiz total can be different from the points allocated to the questions)
The grade that you are seeing should be the percentage score of the questions times points possible (based on my test and what nwilson7 stated). so if they scored 25/30 on the quiz questions, then their score should be an 83.33 (25/30 = 0.833 and 0.833*100 = 83.33)
As for the confusion on assignments and quizzes. All graded work goes under the assignment umbrella in Canvas. However, there are different types of assignments. A regular assignment, quizzes, discussions or external tools.
The assignment points are used for the grade calculation. If you have a quiz worth 100 points, a discussion worth 100 points and a regular assignment worth 100 points, The total score will be out of 300 points possible. So for my quiz above 83.33 of the 300 points would come from getting 25/30 questions correct.
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