Question

A recipe for cinnamon rolls calls for 2 cups of flour for every 4/1 cup of water. Using the same recipe, how much water will you need for 9 cups of flour?

Answer 1

18 cups of water. You technically only need to enlarge the equation, so you take the 9 and divide by 2. The result of that is what you would multiply the 4/1 cups of water by, to get 18.