Answer:
14 biscuits
Explanation:
Since Shawna uses 3/16 of the dough for each biscuit we just need to find how many 3/16ths are in our 2 3/4 cups of dough. To do this, you can just perform the calculation:

or
(The decimals are just the fractions in decimal form)
We don't have enough dough to round up to 15 biscuits, so we only have enough to make 14.