Complex sentence: The film was very well received at the box office, making $879 million USD worldwide and is the 25th highest-grossing film of all time, and is the seventh highest grossing film in the "Harry Potter" series.
Split into simpler sentences: The film was very well received at the box office, making $879 million USD worldwide and is the 25th highest-grossing film of all time. The seventh highest grossing film in the "Harry Potter" series.