Question

Lorinda can walk 1.8 miles in 30 minutes.

Which proportion can be used to find how many miles she can walk in 45 minutes?

Answer 1

Set up a rate proportion:
1.8 miles / 30 minutes = x miles / 45 minutes,
i.e. 1.8/30 = x/45. Solving gives x = 1.8*(45/30) = 2.7 miles.