Question

what are the steps to answer this question? Jeff is baking a cake. The recipe says that he has to mix 32 grams of powder to the flour. Jeff knos that 1 cup of that particular powder has a mass of 128 grams. He added 2/3 of a cup of powder to the flour. Should Jeff add more powder to make the exact recipe, or did he go over and by what amount?

Answer 1

Well what I would do first is to divide 128 by 32 which I do believe gets you 4. So now you know that 1 cup of powder can make 4 servings. So you now know that each serving only requires 1/4 cup of the powder.

So now we know Jeff went over so now we have Jeff added 2/3 and he only needs 1/4. I would now make them both equivalent by multiplying the numerator and denominator of 2/3 by 4 and the same for 1/4 but instead by 4 multiply it by 3 which you would get 2/3=8/12 and 1/4=3/12. Now subtract the two to get your answer.

8/12-3/12=5/12

Answer: He went over and he needs to remove 5/12 of the cup