Question

Write a proportion to find how many points x a student needs to score on a test worth 50 points to get a test score of 40%.

Answer 1

A score of 20 points would correspond with a test score of 40%.

Explanation:

x 40% How many points (x) correspond to a 40% grade?

------------ = ---------

50 pts 100% 50 points corresponds to a 100% grade.

100x = 2000 divide both sides by 100

x = 20

Answer 2

20 pts

Explanation:

50 points corresponds to a 100% grade. How many points (x) correspond to a 40% grade?

x 40%

------------ = ---------

50 pts 100%

Then 100x = 2000, and so x = 20.

A score of 20 points would correspond with a test score of 40%.