Answer:
About 585 slaves aboard each ship.
Step-by-step explanation:
If you divide the amount of voyages (20,528) by the number of slaves (12,000,000) you will get a decimal that rounds up to 585.
Step one) Divide the number of slaves by the number of voyages
12,000,000 ÷ 20,528 = 584.5
Step two) Round your answer to the nearest whole number
584.5 ≈ 585
Hope this helps!