3.
In 1791, the enslaved population of Haiti was approximately 500,000. By 1804, after independence, the population had declined significantly due to warfare and disease. If the 1804 population was$\frac{3}{5}$of the 1791 population, what was the approximate population in 1804? Express your answer as a whole number.
Answer: Multiply the 1791 population by$\frac{3}{5}$:$500,000 \times \frac{3}{5} = \frac{500,000 \times 3}{5} = \frac{1,500,000}{5} = 300,000$people. Therefore, the approximate population in 1804 was 300,000 people.
Common error: Students may multiply 500,000 by 3 and forget to divide by 5, giving 1,500,000 instead of 300,000. Encourage showing all steps clearly and simplifying before multiplying when possible (i.e., noting that$500,000 \div 5 = 100,000$, so$100,000 \times 3 = 300,000$).