Which ratio correctly compares 3 yards to 27 feet, when the lengths are written using the same units?

Note: 3 feet = 1 yard

A. 1 : 9

B. 3 : 1

C. 1 : 3

D. 9 : 1

SO in order to put both in the same form we have to choose a form so lets use feet as our chosen form.

we already 27 as feet so 3 yards * 3 equals nine which is the feet.

9:27

3:9

1:3

so 1:3 is the ratio