Set up long division:
. 4 5
-----------------
11 / 5. 0 0 0
4 4
------------------
6 0
55
---------
5 and so on. Suggest you take this to 3 decimal places.
On a calculator, you'll get 0.45454545... (a repeating decimal); I'd suggest
you round this off to 3 decimal places: 0.455.
