Answer:
She needs 1/12 yd more.
Explanation:
She needs:
2 1/4 yd for first project
1/3 yd for second project
She starts with 2 1/2 yd and makes the first project.
Now she has:
2 1/2 - 2 1/4 = 2 2/4 - 2 1/4 = 1/4
After making the first project, she has 1/4 yd left
To make the second project, she needs 1/3 yd.
1/3 yd is more than 1/4 yd, so she does not have enough.
1/3 - 1/4 = 4/12 - 3/12 = 1/12
She needs 1/12 yd more.