obratno

1. the other way round; conversely
   Nije on nju ostavio, nego obratno. — He didn't leave her, it was the other way round.
   Pročitaj brojeve obratno, od kraja. — Read the numbers backwards, from the end.
2. (in i obratno) and vice versa
   Autobus vozi iz Beograda u Novi Sad i obratno. — The bus runs from Belgrade to Novi Sad and back.

In everyday speech obrnuto is more frequent.