hey mate. ive got a sorting problem that i would like to share...

i made a script that sorts the bdf command and redirected the output to a file. the output of the file is:

691416 34% /
851552 7% /stand
7203048 31% /var
23637584 26% /var/adm/crash
2968864 37% /usr
1744096 16% /tmp
2381048 54% /opt
514848 51% /home
17% /home/com
986359 81% /home/appl
36% /backup_master
91% /backup
8227336 17% /home/com
2593361 36% /backup_master
5903593 91% /backup


please tell me how to sort out the file so that i can remove the ones in
bold (blue) because they are just copies of the file systems in bold (black).
please help me...