A draftsperson wishes to produce a scale drawing of a house's floor plan. The actual dimensions of the house are to be 60 ft by 32 ft. The scale rate for the drawing is 1 in. represents 1.25 ft.
Firstly, what's the difference between a scale rate and a scale ratio? How can I find the scale ratio given the scale rate?
A glance at scale rate and similar pages shows that scale rate is not what you are talking about. Scale ratio is. In your example, 1 inch = 1.25 feet, so the ratio is 1:15, or 1/15 (because there are 15 inches in 1.25 feet).
Added 10 hours later: One can also say just plain scale. "The scale is 1:15" is probably more common than "the scale ratio is 1:15", and equally correct.