Horace buys 2 3/4 pounds of blueberries for a pie.He needs 48 ounces of blueberries for the pie.How many more pounds of blueberries does he need to buy?

1 pound = 16 oz
2pound= 32 oz
3/4pound = 3 of 16/4= 3•4=12
He has 32+12 = 44 oz
He needs 48 so it needs 48-44= 4 more oz