You have a test or quiz coming up and you want to know how much that test or quiz will affect your grade.

Here is what you do.

Start with my most current grade for you off the internet.  If there have been any assignments between that positing and now, use How to calculate your grade between postings to figure out your current grade.  Starting with that fraction

 # points you have now ----------------------------------- total possible points so far

total possible points so far + total points test/quiz will be worth = total points after quiz

Multiply the total points after quiz x .9 to see the points needed for 90%

## POSSIBLE AFTER QUIZ

### NEEDED AFTER QUIZ

total points after quiz

# X

0.90

=

Points needed for 90%

total points after quiz

# X

0.80

=

Points needed for 80%

total points after quiz

# X

0.70

=

Points needed for 70%

total points after quiz

# X

0.60

=

Points needed for 60%

Example:

You currently have 160 points out of 200 possible (80%).  A quiz is coming that will be 30 points.  How many points do you need on the quiz to stay at 80% ?

Solution:

1. Total points after quiz = 200 + 30 = 230 points

2.  230 x 0.80 = 184 (points needed for 80% after the quiz).

184 (points needed) – 160 (points so far) = POINTS NEEDED ON QUIZ

TO STAY AT 80%