Projected Global Population in 2025 by Age and World Bank Income Class (millions) Age group Lower Higher Total <15 1,500 500 2,000 15-24 500

Projected Global Population in 2025 by Age and World Bank Income Class (millions) Age group Lower Higher Total 64 250 750 1,000 Total 4,250 3,750 8,000 Sources: Adapted from World Bank (income classes by country), United Nations (population by country and age). From this table you can glean different kinds of information about the income and age distribution for the population expected in 2025. This age- wealth distribution is of key importance for understanding the long term environmental integrity of the planet. Use the table to calculate the fraction and/or percentage of various age-income groups, as indicated in the following questions. Expressed as a fraction, what proportion of the 8,000 million population in 2025 do the 500 Lower and 15-24 groups make up? Because all the values are in millions, you need only enter the values in the table to get the correct answers. Reduce your fraction to the lowest terms. O 3/32 O 1/2 O 1/4 O 3/16 1/16