Reggie is making doll clothes for his little sister. He has 3 yards of fabric. If each dress uses 3/8 yard of fabric, how many dresses can he make?

To find the number of dresses Reggie can make, divide the total yards of fabric he has by the yards needed per dress: 3 yards / (3/8) yards = <<3/(3/8)=8>>8 dresses. Answer: \boxed{8}.