I Checked the bash I am working on 

```
$ which bash
/usr/local/bin/bash
$ ls -l $(which bash)
lrwxr-xr-x 1 me 30 Oct 27 10:40 /usr/local/bin/bash -> ../Cellar/bash/4.4.23/bin/bash

```

Then I come to view bash's parent directory `usr/local/bin/`

```
$ ls -l ../$(which bash)
ls: cannot access '..//usr/local/bin/bash': No such file or directory
$ ls -l ..$(which bash)
ls: cannot access '../usr/local/bin/bash': No such file or directory

```

Unfortunately, I fall back to errors.

How could I navigate to bash's parent folder using command substitution $?