How do I use 'DECLARE' in SSRS 2012?

Hi,

This will be my first report to be created with 'DECLARE' in the SQL query.

How do I use or convert this in SSRS? Should I convert this to Stored Procedure? If so, do I need to create SP in SSRS or SSMS?

If anyone can provide a sample of the converted SP from below query and show how to use that in SSRS, would be of great help.

Here is the SQL Query -

Declare @Current_College_year Varchar(20)
,@Prior_College_year Varchar(20)

Set @Current_College_year = '2015-16'
set @Prior_College_year = '2014-15'

select
CYR.College_YEAR
,CYR.SPE_ALT as CYR_EStatus
,CYR.College_DIS_CODE
,DIST.DIS_NAME
,PYR.College_YEAR
,PYR.SPE_ALT as PYR_EStatus
,PYR.College_DIS_CODE
,ISNULL(CYR_COUNT,0) as CYR_COUNT
,ISNULL(PYR_COUNT,0) as PYR_COUNT
,(ISNULL(CYR_COUNT,0)-ISNULL(PYR_COUNT,0)) as Count_Diff
,case when ISNULL(PYR_COUNT,0) = 0 then 0  else cast((CYR_COUNT-PYR_COUNT)/cast(PYR_COUNT as numeric(8,2)) as numeric(8,2)) end *100 AS Percent_Diff

from

(select
ml.SPE_ALT,ml.SPE_SORT
,College_DIS_CODE
,College_YEAR
,count(distinct s_key) AS CYR_COUNT
from
TELECOLL_R.ML_ATTEND as ml WITH (NOLOCK)
where College_year = @Current_College_year
and  enrolled_fs_id = 'Yes'
group by ml.SPE_ALT,ml.SPE_SORT,College_DIS_CODE,College_YEAR
)CYR
left join
(
select
ml.SPE_ALT,ml.SPE_SORT
,College_DIS_CODE
,College_YEAR
,count(distinct s_key) AS PYR_COUNT
from
TELECOLL_R.ML_ATTEND as ml WITH (NOLOCK)
where 1=1
and College_year = @Prior_College_year
and  enrolled_fs_id = 'Yes'
group by ml.SPE_ALT,ml.SPE_SORT,College_DIS_CODE,College_YEAR
)PYR
on CYR.College_DIS_CODE = PYR.College_DIS_CODE
and CYR.SPE_ALT = PYR.SPE_ALT
left join [TELECOLL_USRDATA].[XL_DIS] as DIS WITH (NOLOCK)
on CYR.College_DIS_CODE = dist.DIS_ID
order by Percent_Diff