Amy is using a recipe for punch for a party that uses 1/3 cup of orange juice and 3/4 cup of pineapple juice. How many cups of orange juice are needed if she has 9 cups of pineapple juice?

1 Answer
Dec 14, 2017

This is a ratio.

Let's call orange juice o and pineapple juice p.

So, 1/3o:3/4p.

Now we need 9 cups of pineapple juice.

Multiplying both sides by 12, we get:

4o:9p.

This is what we want because there are 9 cups of pineapple juice.

Therefore, the answer is 4 Cups of Orange Juice.

Yay!