Final answer:
The poverty rate for country B is calculated by dividing the number of people living below the poverty line (100 million) by the total population (900 million) and then multiplying by 100, resulting in a poverty rate of 11.11%.
Step-by-step explanation:
The poverty rate is a significant social indicator that reflects the percentage of the population living below the poverty line within a certain area, such as a country. To calculate the poverty rate, one would divide the number of people living below the poverty line by the total population and then multiply the result by 100 to obtain a percentage.
In the scenario provided for country B, where the population is 900 million and 100 million people are living below the poverty line, the calculation would be as follows:
- Divide the number of people living in poverty (100 million) by the total population (900 million).
- Multiply the result by 100 to get the percentage.
Therefore, the poverty rate would be:
(100 million / 900 million) * 100 = 11.11%
This means that 11.11% of Country B's population lives below the poverty line.