How to find out differences between two timestamps and extract only hours and minutes

How to find out the difference between two timestamps and get only hours and minutes from the difference? I tried using the extract function or doing straight subtraction but I am not getting the expected result.

select (to_timestamp('29-09-22 2:27:48.696000000 PM +05:30') - systimestamp)col from dual;

DB Version: Oracle SQL Developer (18c)

>Solution :

Use EXTRACT:

SELECT EXTRACT(DAY FROM diff)*24 + EXTRACT(HOUR FROM diff) AS hours,
       EXTRACT(MINUTE FROM diff) AS minutes
FROM   (
  select TIMESTAMP '2022-09-29 14:27:48.696000000 +05:30' - systimestamp AS diff
  from   dual
);

Which outputs:

fiddle