Add information about partition size in percentage

lvm.md

@@ -13,6 +13,7 @@
     - If you get *Device excluded by a filter*, it means that you have to delete the partitions on that device first
 - Create Volume Group: `vgcreate <volGroupName> /dev/<device>`
 - Create Virtual Volume: `lvcreate -n <volName> -L <size> <volGroupName>`
+    - To make the volume use up all available space of the VG use `-l +100%FREE` instead of `-L`
 - Create file system: `mkfs.ext4 /dev/<volGroupName>/<volName>`
 
 ## Fstab Mount