Follow the grading scheme guide to specify the cutoff percentages for each letter grade.
Note: these percentages are not rounded. If a B+ is from exactly 87% to anything less than 90%, then a score of 86.9% would result in a B and a score of 90% would result in an A-.
* If you need to further manipulate the grade distribution or use a custom formula to determine the final grade, navigate to your Gradebook to export a CSV file. When you are satisfied with your calculations, import the revised file. See also Key Concepts for Grading in Canvas.