Question

Mrs. Bennett has graded 20% of her students' 150 papers. How many papers does she still need to finish grading?

Answer 1

120 papers

Explanation:

Step 1: Determine how many papers has Mrs. Bennett already graded:

Since Mrs. Bennett graded 20% of her students' 150 papers, we can determine how many papers she has already graded by multiplying 0.20 (20% as a decimal) by 150:

Amount of papers graded = 0.20 * 150

Amount of papers graded = 30

Thus, Mrs. Bennet has already graded 30 papers.

Step 2: Subtract 30 from 150 to determine the amount of ungraded papers:

Now we can determine how many papers Mrs. Bennett still must grade by subtracting 30 (20% of 150) from 150:

Amount of papers ungraded = 150 - 30

Amount of papers ungraded = 120

Thus, Mrs. Bennet needs to finish grading 120 papers.