Question 703136
Six carpenters can build 6 doghouses in 6 days. How many days will it take 3 carpenters to build 2 doghouses?

Six carpenters can build 6 doghouses in 6 days. 
Therefore 3 (half as many) carpenters would take 12 (twice as many) 
days to build those 6 doghouses.  To build 2 doghouses (one-third as many)
would only take them 4 days (one third of 12 days).

Edwin