We can infer that more cups of flour are needed as the cakes are increased, so we can apply a rule of three, simple with direct proportion to find the answer:
12 cakes ----> 22 cups flour
30 cakes ----> x
x = (30)(22)/12
x = 55
therefore 55 cups of flour are needed to bake 30 cakes
D. 12 x 1/3
You just had to multiply 6 x 2/3 which gives you 4.
Then, multiply all of your answer choices and see which one also gives you 4. D is the only one.
