Complex sentence: The wort would be boiled for 90 to 120 minutes, and approximately 80% of the hops would be added after 15 minutes and the remaining 20% added 30 minutes before the end of the boil.
Split into simpler sentences: The wort would be boiled for 90 to 120 minutes. Approximately 80% of the hops were added after 15 minutes and the remaining 20% were added 30 minutes before the end of the boil.