Question

Alexandra is following a recipe that requires three fourths cup of water. She needs to make 10 servings. How many cups of water does Alexandra need?

one and one fifth cups
three and one fourth cups
seven and two fourths cups
eight and two thirds cups

Answer 1

3/4 • 10 = 30/4 = 7 2/4

Answer 2

So if one batch needs 3/4 of a cup and she needs to make 10 batches then you multiply how many batches by how many water cups required for one batch:

3/4 • 10 = 30/4 = 7 2/4

So she needs seven and two fourths cups of water.