Scale drawing

Question

In real life, the hall closet is 6 feet wide. It is 4inches wide in the drawing. What scale factor does the drawing use? Simplify your answer and write it as ratio, using a colon.

Answer 1

6':4" = 6 * 12":4" = 18":1" 

You could also write this 1.5':1"...which is the easier way to write it for purposes of calculation from the blueprint to the actual space.