Round error when inserting double

Hi,

I have the following SQL Script.  This performs a simple insert of a rounded double value to 2 decimal places.  My problem is that the inserted value is not rounded correctly.  I am performing this task on HANA SP4 AWS

CREATE PROCEDURE PROC_TEST

language sqlscript as

k1 double;

begin

     -- this gives one row result of 0.28  (i checked that)

     select round(0.28748488447738373 , 2) from dummy

     into k1;

     -- this is where is goes bad

     INSERT INTO "mytable" VALUES(k1); 

END;

I have an inserted value of:  0.280000000003  

THAT IS WRONG.

Where did this rounding error come from? 

Cheers,

Steven.