Question

If there is a 7 1/2 foot long couch and I want to scale it down with 1 inch : 2 feet what would the length be

Answer 1

Explanation:

1 inch = 2 ft

7 1/2 ft is the same as 7.5 ft

make a proportion

1 inch to 2 ft = x inches to 7.5 ft

make a proportion...

1 / 2 = x / 7.5

cross multiply

(2)(x) = (1)(7.5)

2x = 7.5

x = 7.5 / 2

x = 3.75 inches or 3 3/4 ft <===