sql - how can i use cast function and get correct result -

i wrong result unsing cast function.it should simple can not figure out. need help.

select        prco, employee, lastname, firstname, midname, sortname, ssn, hiredate, datediff(month, hiredate, getdate()) / 12 years,                cast((80/2080) decimal(10, 5))           aaaa 

80/2080 column should 0.038470 shows 0.00000 records

it's doing division operation before cast. when divide 2 integers result integer, meaning decimal portion truncated. in case, leaves 0 result. 0 cast decimal(10,5) still 0.00000.

this should give correct result:

cast((80/2080.0) decimal(10, 5))