No. She needs 3/4 more rope. To figure out this, you multiply 5 and 3/8, which gives you 1 and 7/8. To figure out how much you need, subtract that from 2 5/8 which is 3/4.
Sandra does not have enough rope. She needs 6/8 or 3/4 yards more rope. (WARNING: THIS ANSWER MAY BE WRONG!)