What was the average profitability of the English slave trade in the late 18th century? AP World History Chapter 20 What was the average profitability of the English slave trade in the late 18th century? a. 100 percent b. 25-30 percent c. Over 50 percent d. 5-10 percent e. 15-20 percent Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+