Which carpet price is less expensive?
$9.00 per square yard?
$1.50 per square foot?
1. The same units of measuring are needed in order to compare the prices.
2. You need to have a conversion factor between the units of square foot and square yard.
3. Remember that a conversion factor is a fraction that can be flipped over when necessary.
4. Notice how the units divide out (shown by marking through them).
Answer: $9.00 per square yd is equal to $1.00 per square foot, so $9.00 per square yd is the cheaper price than $1.50 per square foot.