Darcy likes to eat peanut butter and raisins on apple slices. On each apple slice, she puts 1/16 cup of peanut butter and 8 raisins. Darcy has 2/5 cups of peanut butter and 80 raisins. She eats a whole number of apple slices until the peanut butter is all gone. What fraction of the 80 raisins did she eat? Enter the fraction in the response box.