Final answer:
To find the price per square foot, divide the price per square yard by 9.
Step-by-step explanation:
To find the price per square foot, we need to convert the price from square yards to square feet. Since there are 9 square feet in 1 square yard, we can calculate the price per square foot by dividing the price per square yard by 9. So, $20 per square yard is equivalent to $2.22 per square foot.