Answer:
![(21)/(16)\ cups\ of\ sugar\approx1.3\ cups\ of\ sugar](https://img.qammunity.org/2020/formulas/mathematics/middle-school/w2l8ujyztqa7d9r1e2xj47su56uw4xdlyn.png)
Explanation:
Let be "x" the cups of sugar needed for a full batch of brownies.
You need to analize the information provided in the exercise.
Since Henry uses
cups of sugar for
batch of brownies, you can write the following proportion:
![((3)/(8))/((2)/(7))=(x)/(1)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y0rbmis2wyjezb0qlw0hcqo7g6it01v1w7.png)
Finally, you must solve for "x".
Therefore, you get the following result: