What is the ratio 640 and 800 in lowest terms

Put the following steps for calculating net worth in the correct order. step #1: step #2: step #3: step #4: step #5:

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment. b. the allocation of resources between private markets and the public sector. c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t. d. differences in productivity. e. ones that think at the margin and respond to incentives and those that don’t.

The most heavily populated areas of africa are found