The number of half pound cake packages of tea that can be made up from a box that holds 10.25 pounds of tea is
20.5 packages.
Since there are 2 half pound packages in a pound, you would divide the total weight of the box of tea by 0.5 to find out how many half pound cake packages can be made.
10.25 pounds / 0.5 = 20.5 half pound cake packages of tea.