Creating a % change from one value

Hi,

I've got two years' worth of data which is split in my matrix (column) by Academic Year.

So like this:

                           2015/16                                   2016/17

A                          100                                            120

B                            80                                               90

C                            78                                               77

The value is called Funding.

Is it possible to create a % change when it is only one value? (i.e. I've read that you can do this if two seperate columns e.g. Funding15 & Funding16).

Any help appreciated!

Thanks

Simon