Expand Partition SD on Ubuntu Mate 15.10 in Raspberry PI 2

Open Terminal Command

Type this: 

sudo fdisk /dev/mmcblk0

insert your password 

Delete partition

Command (m for help): d <----    
Partition number (1,2, default 2): 2  <----

Partition is deleted

Partition 2 has been deleted.

Create new partition

Command (m for help): n  <----
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): p <----
Partition number (2-4, default 2): 2 <----

Press Enter For total size

First sector (133120-31116287, default 133120):   ENTER  <----
Last sector, +sectors or +size{K,M,G,T,P} (133120-31116287, default 31116287):

Created a new partition 2 of type 'Linux' and of size 14,8 GiB.: ENTER <---

Close fdisk  type w

Command (m for help): w  <----
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

Reboot System

sudo reboot  <----

Open Terminal Command

Type this: 

sudo resize2fs /dev/mmcblk0p2

insert your password 
 Finish