To solve this, we have to divide 57 cups (the total amount she has) by 3.25 (the amount she needs per batch). When we do this, we get 17. 54, but we'll round down because Jess can't make 0.54 of a batch of cupcakes. Your answer should be 17 batches. I hope this helps!
Honestly? Just review your notes and try to work out the problems yourself before taking a look at the answer. You can also google specific topics that the test will cover and try the practice problems.