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?
Accepted Solution
A:
One cup of that particular chocolate powder has a mass of 128 grams: 1c = 128g
64 grams of chocolate powder is x cups.1c = 128gx = 64g 1c : 128 g = x : 64gx = 1c : 128 g * 64 gx = 0.5 c64 grams of chocolate powder is 0.5 cups = 1/2 cups She added two over three of a cup of chocolate powder: 2/3 cups She need to add 1/2 cups: 1/2 = 3/6 cupsShe added 2/3 cups: 2/3 = 4/6 cups So she added 4/6 - 3/6 = 1/6 cups more.