Which set of numbers are equivalent a)32.32% 1/32 b 0.45.50% 45/90 c)0.30.30%,30/300 d)30/200

The study of where things are 

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.