First you have to divide 5 by 8 to see how much butter is used for each pancake and then multiply the quotient of that by 4 and that would get you the answer to Part A. For Part B you use the quotient that you got for 8 divided by 5 and multiply it by 12 to get Part B.
craig needs 7.5 grams of butter to make 12 pancakes.
Step-by-step explanation:
you take 250 ml of milk and divide that by 8. which then tells you how much milk you need per pancake. which is 31.25 ml. you multiply that number by 4 and then you get 125 ml of milk for 4 pancakes.
you take 5 grams of butter and divide it by 8 pancakes and you get 625 milligrams. 625 milligrams is how much you need for each pancake. so you do 625 milligrams times 12 and you get 7.5 grams of butter. :) your welcome