Packing efficiency of all these kind of arrangements is given as follows.
(i) Simple cubic :- Its packing efficiency is 52% .
(ii) Body centred cubic :- Its packing efficiency is 68%.
(iii) Hexagonal close packing:- Its packing efficiency is 74% .
Conclusion :- From the above data we can conclude that hexagonal close packed lattice is having the maximum packing efficiency.