Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_203_74 ( id number, "rank" number, "urban area" text, "population\n(2001 census)" number, "area (km2)" number, "density (people/km2)" number, "major subdivisions" text, "metropolitan area" text )

### Question ###
how many urban areas have a density below 2,500 ?

### Accurate SQL ###

SELECT COUNT("urban area") FROM table_203_74 WHERE "density (people/km2)" < 2500