Aanya bought 2 1/2 yards of ribbon. She cuts the ribbon into pieces 3/8 of a yard in length. How many pieces does she have?

To find the number of pieces, we need to divide the total length of the ribbon by the length of each piece.

Total length of ribbon = 2 1/2 yards = 2 + 1/2 = 2.5 yards

Length of each piece = 3/8 yards

Number of pieces = (Total length of ribbon) / (Length of each piece) = 2.5 / (3/8) = 2.5 * (8/3) = <<2.5*(8/3)=6.666666666666667>>6.67

Therefore, Aanya has 6.67 pieces of ribbon.