What was the average mortality rate for slaves shipped to the Americas in the Atlantic slave trade? AP World History Chapter 20 What was the average mortality rate for slaves shipped to the Americas in the Atlantic slave trade? a. 18-20 percent b. 10-15 percent c. less than 10 percent d. 25-40 percent e. 55-65 percent Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+