RMAN Backup completion check query in %

 From the below query, you can check how much RMAN backup completed in %.

set echo on timing on
set lines 200
col username        format a10
col OPNAME          format a35
col SOFAR           format 999,999,999
col TOTALWORK       format 999,999,999
col 'Work Done %'   format 999.99
col Start_time      format a20
select SID,username,OPNAME,SOFAR,TOTALWORK,SOFAR/TOTALWORK*100 "Work Done %",
to_char(START_TIME,'DD-MON-YY hh24:mi:ss') "Start_time",
to_char(sysdate + TIME_REMAINING/3600/24,'DD-MON-YY hh24:mi:ss') "End_at"
from  v$session_longops
where sofar!=TOTALWORK and totalwork!=0
      and OPNAME like 'RMAN%';