Final answer:
For each cup of white sugar, 1 ®/₈ cups of brown sugar are needed, as determined by setting up a proportion using the original recipe that calls for ⅓ cup of white sugar to ¾ cup of brown sugar.
Step-by-step explanation:
To determine the amount of brown sugar needed per cup of white sugar, we set up a proportion based on the recipe's requirement that calls for ⅓ cup (white sugar) to ¾ cup (brown sugar). To find out how much brown sugar is needed per 1 cup of white sugar, we solve the following proportion:
¾ cup brown sugar / ⅓ cup white sugar = x cup brown sugar / 1 cup white sugar
To solve for x, we cross multiply:
(¾) * 1 = (⅓) * x
Now, we find x:
x = (¾) * (3/2)
x = 9/8
x = 1 ®/₈ cups of brown sugar
Therefore, for every cup of white sugar, you will need 1 ®/₈ cups of brown sugar in the recipe.