Write the ratio 20 inches to 3 feet using fractional notation. Simplify the fraction to lowest terms. Use 1 foot = 12 inches to first write feet as inches.
A:20/3
B:3/20
C:9/5
D:5/9
A: 20 inches to 3 feet is equivalent to 20 inches to 36 inches (3 feet * 12 inches/foot).
So, the ratio in fractional notation is 20/36, which simplifies to 5/9 in lowest terms.
Therefore, the correct answer is D: 5/9.