In the quiz asking for “half a sandwich”, I put “la mitad de un bocadillo” instead of “medio bocadillo” and was marked incorrect.
Is my answer in fact incorrect or just not what the answer was looking for? When we say “half a sandwich” in English, my understanding is that it is really shorthand for “half (of) a sandwich” and so I thought either “la mitad de” or “medio” would be correct - perhaps that is not true in Spanish?
Thanks in advance for your explanation.