Mary is baking a cake. The recipe calls for 9 cups of flour and 11 cups of sugar. She already put in 4 cups of flour. How many more cups of sugar than cups of flour does she need to add now?
First, we need to figure out how many cups of flour she needs to add. The recipe calls for 9 cups of flour, and she has already put in 4 cups of flour. So she needs to add 9 - 4 = 5 cups of flour. 

Next, we need to figure out how many cups of sugar she needs to add. The recipe calls for 11 cups of sugar, and she has already put in 4 cups of sugar. So she needs to add 11 - 4 = 7 cups of sugar. 

Finally, we need to figure out how many more cups of sugar than cups of flour she needs to add. We know that she needs to add 5 cups of flour and 7 cups of sugar. So she needs to add 7 - 5 = 2 more cups of sugar than cups of flour.