Respuesta :
Answer:
9 : 5
Step-by-step explanation:
The quantities must be in the same units of measure.
Using the conversion
1 yard = 3 feet, thus
12 yards = 12 × 3 = 36 feet, then
36 : 20 ← divide both parts of ratio by 4
= 9 : 5 ← in simplest form