Answer:
3.1 million
Step-by-step explanation:
¨Portugal and Britain were the two most ‘successful’ slave-trading countries accounting for about 70% of all Africans transported to the Americas. Britain was the most dominant between 1640 and 1807 when the British slave trade was abolished. It is estimated that Britain transported 3.1 million Africans (of whom 2.7 million arrived) to the British colonies in the Caribbean, North and South America and to other countries.¨