Reduce Fusion Disk Size safely?

Hey everyone,

I have VMware Fusion with Ubuntu installed on my Macbook Pro and with how small the SSD is I am looking to clean up some space.

When I right click Virtual Machines and select Get Info its telling me the folder size is 32GB.

In Ubuntu though its telling me its only using 3GB of a available 18GB.

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda1        18G  3.6G   14G  22% /

udev           1000M  4.0K 1000M   1% /dev

tmpfs           403M  800K  402M   1% /run

none            5.0M     0  5.0M   0% /run/lock

none           1007M  200K 1007M   1% /run/shm

Is there a safe way for me to reduce the space that VMware is using here?