Estimating in word problems with fractions. Rosa needs 5 1/4 of ribbon for a crafts project. She already has 2 7/8 of ribbon. How many more yards of ribbon does she need to buy?

Rosa requires of ribbon to complete the project.

Step-by-step explanation:

We are given the following in the question:

Length of ribbon required for project =

Length of ribbon Rosa have =

Amount of ribbon required for the project =

Length of ribbon required for project - Length of ribbon Rosa have

Thus, Rosa requires of ribbon to complete the project.