Declare @flt as Float
Set @flt = 3.44445556
Select round(@flt,1)
OUTPUT :3.3999999999999999
AND IF YOU USE MONEY DATATYPE
Declare @flt as MONEY
Set @flt = 3.44445556
Select round(@flt,1)
OUTPUT : 3.40
BETTER TO USE MONEY DATATYPE
Hope This May Help You..