Final answer:
To calculate the poverty rate in country A and B, divide the number of people below the poverty line by the total population and multiply by 100. Country A has a poverty rate of approximately 16.67%, and country B has a poverty rate of approximately 11.11%.
Step-by-step explanation:
The poverty rate in a country is calculated by dividing the number of people living below the poverty line by the total population and then multiplying by 100 to get a percentage. For country A, with a population of 300 million and 50 million people living below the poverty line, the poverty rate would be:
Poverty Rate = (Number of People Below Poverty Line / Total Population) × 100
Poverty Rate = (50 million / 300 million) × 100
Poverty Rate = (1/6) × 100 ≈ 16.67%
In the case of country B, with a population of 900 million and 100 million people living below the poverty line, the poverty rate would be:
Poverty Rate = (100 million / 900 million) × 100
Poverty Rate = (1/9) × 100 ≈ 11.11%