You can put this solution on YOUR website! You presently have 49% of 80%. What have you in one simple number presently is (0.8)*49%, or 39.2%. The best you can hope for is to get all 100% of your final exam worth 20% of your course. This would put your percentage in the class at 39.2+20=59.2%, probably not enough to pass your class. What kind of grading scale would the teacher use? Is the class a tough one and the teacher use how the students score to determine the grading scale?