Suppose we are making a large batch of fizzy juice and the recipe says, "Mix 5 cups of cranberry juice with 2 cups of soda water." We know that the ratio of cranberry juice to soda water is 5:2, and that we need 2.5 cups of cranberry juice per cup of soda water.We still need to know something about the size of the large batch. If we use 16 cups of soda water, what number goes with 16 to make a ratio that is equivalent to 5:2?