"Where are you now at?" — grammatically correct?
Solution 1:
Both are possible in speech, although the first is probably more likely. They can be:
a) an inquiry about someone's location;
b) an inquiry about someone's mental, spiritual or emotional state; or
c) an inquiry about which page someone has reached in a book.
Solution 2:
Neither example feels very comfortable grammatically although I feel this is perhaps a BE view. We used to say 'a preposition should never be used to end a sentence with.' In fact, the use of at in either case seems redundant since both examples make sense without it.