Complex sentence: The album was a departure from Wonder's earlier, teen pop-driven albums, and, along with its predecessor, "Up-Tight", it re-established the sixteen-year-old Wonder, whose voice had recently changed, as a Motown hitmaker.
Split into simpler sentences: The album was a departure from Wonder's earlier, teen pop-driven albums. This album and its predecessor, "Up-Tight", re-established the sixteen-year-old Wonder, whose voice had recently changed, as a Motown hitmaker.