Sure, here are the 10 countries with the fastest growing population and the 10 countries with the slowest growing population according to the United Nations World Population Prospects 2021 report:
10 Countries with the Fastest Growing Population
1. Niger
2. Angola
3. Burundi
4. Mali
5. Somalia
6. South Sudan
7. Chad
8. Zambia
9. Tanzania
10. Sierra Leone
10 Countries with the Slowest Growing Population
1. Japan
2. Latvia
3. Ukraine
4. Croatia
5. Lithuania
6. Romania
7. Hungary
8. Serbia
9. Poland
10. Bulgaria
The concept of percentage increase and decrease is related to population growth because it represents the change in population over a certain period of time. Percentage increase refers to the rate at which the population is growing, while percentage decrease refers to the rate at which the population is declining.
To calculate the percentage increase or decrease in population, you need to take the difference between the initial population and the final population, divide it by the initial population, and then multiply by 100 to get the percentage change. For example, if a country's population was 100 million in 2020 and 110 million in 2021, the percentage increase in population would be (110-100)/100 x 100 = 10%. Conversely, if a country's population was 100 million in 2020 and 90 million in 2021, the percentage decrease in population would be (90-100)/100 x 100 = -10%.
Understanding population growth rates and trends is important for policymakers and planners to make informed decisions about resource allocation, infrastructure development, and social services provision to meet the needs of a growing population. On the other hand, countries with declining populations may face challenges related to an aging workforce, a shrinking tax base, and decreased economic productivity.