Convert each grade to its point value
Add all earned points
Add all possible points
Divide earned points by possible points
Multiply the result by 100
Use the formula: Percentage = (Total Earned Points ÷ Total Possible Points) × 100
If grades are weighted, multiply each grade by its weight first
Add the weighted results
Divide by the total of the weights
Multiply by 100
Use the formula: Weighted Percentage = Σ(Grade × Weight) ÷ Σ(Weights) × 100