A room is 15 feet long and 12 feet wide. A scale drawing of the room is 10 inches by 8 inches. What is the scale of inches in the drawing to inches in the actual room?

Start first by putting this in proportions, converting the feet to inches
10 8
—— = ——
180 144
Simplify as much as possible:
1 1
— = —
18 18
Therefore, the scale is 1:18