SQL Server 2012 :: Calculation Based On Count Function To Format As Decimal Value Or Percentage

I'm trying to get a calculation based on count(*) to format as a decimal value or percentage.

I keep getting 0s for the solution_rejected_percent column. How can I format this like 0.50 (for 50%)?

select mi.id, count(*) as cnt,
count(*) + 1 as cntplusone,
cast(count(*) / (count(*) + 1) as numeric(10,2)) as solution_rejected_percent
from metric_instance mi
INNER JOIN incident i
on i.number = mi.id
WHERE mi.definition = 'Solution Rejected'
AND i.state = 'Closed'
group by mi.id

id cnt cntplusone solution_rejected_percent
-------------------------------------------------- ----------- ----------- ---------------------------------------
INC011256 1 2 0.00
INC011290 1 2 0.00
INC011291 1 2 0.00
INC011522 1 2 0.00
INC011799 2 3 0.00