1. Greg’s Solution

2. If Country A has C% of the Population and D% of the world’s wealth And Country B has E% of the world’s population and F% of wealth Then set up the ratio. . . (Country A : Country B)

3. W= welath and P =population (citizen A):(citizen B) = [(d%w)/(c%p)]/[(e%w)/(f%p)] = [(d%w)/(c%p)]×[(f%p)/(e%w)] = [d%/c%]×[f%/e%] = (df)/(ce)