Answer:
23/ 40 (0.57) yards of fabric
Explanation:
Claire bought 9/10 of a yard of fabric to make her granddaughter a dress. She only used 3/4 of the fabric.
9/ 10 x 3 /4
9/10 x 3/4 = 27/ 40
1 - 27/40 = 40 -27 /40
Therefore, 23/ 40 (0.57) yards of fabric is used by Claire.