Complex sentence: Overall "Knocked Up" was very well received by many critics, and was given a 90% "Certified Fresh" rating on Rotten Tomatoes, based on 225 reviews (203 fresh, 22 rotten).
Split into simpler sentences: Overall "Knocked Up" was very well received by many critics. For example, the film ended up with a 90% "certified fresh" rating on Rotten Tomatoes from 225 reviews (203 fresh, 22 rotten).