How to check Oracle ASM Diskspace

From OS:

[oracle]$ . oraenv
ORACLE_SID = [+ASM] ? +ASM
The Oracle base remains unchanged with value /u01/app/oracle
[oracle]$ asmcmd lsdg
State    Type    Rebal  Sector  Block       AU  Total_MB  Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name
MOUNTED  EXTERN  N         512   4096  1048576     30708    28479                0           28479              0             N  DATA/

From Sqlplus:
[oracle]$ . oraenv
ORACLE_SID = [+ASM] ? +ASM
The Oracle base remains unchanged with value /u01/app/oracle

sqlplus / as sysdba
SQL> SELECT name, free_mb, total_mb, free_mb/total_mb*100 as percentage  FROM v$asm_diskgroup;

NAME                  FREE_MB   TOTAL_MB PERCENTAGE
------------------------------ ---------- ---------- ----------
DATA                    28479      30708 92.7413052