Explanation:
It depends on what each student found for 3 times 2 1/4. If Lisa found the answer to be 6 3/4, then she is correct. If Anthony found the answer to be 7 1/2, then he is incorrect.
To verify, we can convert 2 1/4 to an improper fraction:
2 1/4 = 9/4
Then, we can multiply this fraction by 3 to get:
3 * 9/4 = 27/4 = 6 3/4
So the correct answer is 6 3/4.