Word Problem:

• Princess needs 3 cups of milk for recipe. How many ounces of milk does she need to buy?

Given:

• 3 cups = _____ ounces

Since the given in the problem is in cups, we will be using 1c as the basic unit and 8 ounces as equivalent. Thus,

• 3c = ____ oz
• 1c = 8 oz

Formula:

Thus,

Cancelation:

Since we cannot mulitply numbers with different units, we should cancel the given unit to get the answer by using cross multiplication.

Note: Since the given is a whole number, we will convert into fraction by putting 1 as its denaminator.

Solve:

Solve the equation.

We can also write the equation as:

Therefore:

Answer:

• 24 ounces of milk does she need to buy in equation is 3c = 24 oz