Answer:
To find out how many cups of sugar Andrew would need to make one whole batch of brownies, we can set up a proportion based on the information given. Andrew used 1/2 cups of sugar to make 3/5 batches.
1/2 cups of sugar is used for 3/5 batches. To find out how much sugar is needed for one whole batch, we can set up the proportion:
1/2 cups of sugar / 3/5 batches = x cups of sugar / 1 batch
Cross multiply to solve for x:
(1/2) * 1 = (3/5) * x
1/2 = 3/5 * x
x = (1/2) / (3/5)
x = (1/2) * (5/3)
x = 5/6
Therefore, Andrew would need 5/6 cups of sugar to make one whole batch of brownies.