Complex sentence: John Dukinfield's slave ships traversed approximately 23 voyages for the purpose of buying and selling slaves acquiring roughly 6,448 slaves, 5,183 surviving to be sold in various ports, mainly Jamaica, and Virginia, with less than 3% going to other Caribbean ports.
Split into simpler sentences: John Dukinfield's slave ships traversed approximately 23 voyages for the purpose of buying and selling slaves, acquiring roughly 6,448 slaves, 5,183 surviving. After purchase they were sent to be sold in various ports, mainly Jamaica, and Virginia, with less than 3% going to other Caribbean ports.