1. Add the length of the fabrics together. 2 1/2 + 1 1/4 = 3 3/4. Ciara needs 3 3/4 yards of fabric in total.
2. Subtract 3 from 3 3/4. 3 3/4 - 3 = 3/4. Ciara needs 3/4 yard more of fabric.
3. Multiply $7.98 by 3/4. 3/4 * $7.98 = $5.985. Round to the nearest hundredth to get $5.99.
Ciara needs $5.99 to pay for the rest of her fabric.