SOLUTION: The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, an

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Question 141351: The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the first half of the course, how many points must the student earn in the second half in order to earn an 80% B final grade?
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
Let's simplify this problem:
Available:
first: 120
second: 140
Student earns 81% of 120. How many points are needed of 140 to have 80% of 260?
80% of 260: .8*260=208. This means the student needs to end at 208 points. She has .81*120=97.2 points already. This means she needs 208-97.2=110.8 points of the 140 available in the second half of the course. Percentage-wise this is a 79.14%.