This activity is a great way to practice and reinforce how to multiply whole numbers, fractions, and mixed numbers by a fraction. Students should have already been taught how to change mixed numbers to improper fractions (and vice versa), how to multiply fractions, and how to simplify fractions into lowest terms.
Students will need access to technology so they can search for a cookie recipe. (This is the fun part!) If technology is not accessible, the teacher can print out cookie recipes and have each student choose one. Students then copy down the original recipe and figure out the serving size. The activity then has each student find a fraction of the recipe and then enlarge the recipe.
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