chmod is a utility that allows you to change the file permissions. The octal value 654 equals to -rw-r-x-r-- (or drw-r-x-r-- if it's a directory). This means that the file owner can read and write to the file (but not execute), users in the file's group can read and execute (but not write), while for everyone else it's read-only.
Explanation
You add these up according to what permissions are granted, except if the permissions for any one of the following categories are revoked or rejected (e.g. 000[probably not practical or possible] = nobody can access the file).
use the chmod command syntax: chmod #### -option1 -option2 filename man chmod (for more information)
20 percent of 654 = 654/5 or 130.820% of 654= 20% * 654= 20%/100% * 654= 1308/10= 654/5 or 130.8
22% of 654= 22% * 654= 0.22 * 654= 143.88
27% of 654= 27% * 654= 0.27 * 654= 176.58
All the multiples of 654, which are infinite: 654, 1308, 1962, 2616 + 654 . . .
The chmod command. For it's usage, consult it's manual page with the... $ man chmod command....
45, as a percentage of 654 = 100*45/654 = 6.88%
654 = DCLIV
The typical way to view file permissions is to use the 'ls' command with the long listing options enabled, For example, to see the file permissions for everything in the current directory, type: ls -lsa
74% of 654 = 483.96
718
654 * 3000 = 1,962,000