Final answer:
In converting 540 inches to yards, the unit 'inches' should be placed in the numerator of the conversion ratio, since there are 36 inches in one yard.
Step-by-step explanation:
In converting 540 inches to yards, the unit that you would place in the numerator of your ratio is inches. This is because you are starting with a measurement in inches and converting it to yards. To perform the conversion, you divide the number of inches by the number of inches in one yard. Since there are 36 inches in a yard, you would set up the ratio as follows:
540 inches รท 36 inches/yard = Number of yards
Thus, when converting measurements such as 195 inches or 88 feet into yards, you always want to ensure that inches are placed over yards when setting up the conversion factor.