1. Go to the GRADES tab within your course, below the course title, under Grader Report click Gradebook Setup
2. Then Click the "three dots" under the actions cloumn of the Course Folder and click Edit Category. Then click Show More.
3. In Edit Category and scroll to the item: Grade Display Type in the Category Total section. Here you can select how you want the grades to display in the gradebook. You can choose from LETTER, PERCENTAGE, or REAL -- or a combo. Once selected scroll to the bottom to press SAVE to make the changes.