Laura is baking a cake. The recipe says that she has to mix 64 grams of chocolate powder to the flour. Laura knows that 1 cup of that particular chocolate powder has a mass of 128 grams. She added two over three of a cup of chocolate powder to the flour. Should Laura add more chocolate powder to make the exact recipe, or did she go over and by what amount?

Question

anonymous · Answer

Hi, and welcome! Try this question to start with:

If she needs 64 grams, and she knows that 1 cupful is 128 grams, how many cupfuls does she need?

anonymous · Answer

Assume the problem is correct (no amount the flour is informed),
128*2/3=85.3333>64. So she goes over by 85.3333-64=21.3333. 
The problem didn't tell any ratio of the chocolate to the flour, so I am not very sure about my answer.