Sandy's mom is buying fabric for a prom dress. she already has 4 1/4 yards of fabric at home, and she needs a total of 17 3/6 yards of fabric for the dress. how much more fabric, in yards will sandy's mom need to buy in order to complete the dress?

Sandy will need 13 3/12 more fabric

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.