Year on Year change based on months selection

[#1]

Hi, I have a data set which looks a little like the table below. This is completely hypothetical but the structure of the data is pretty much the same.

Touch Month	Campaign	Cell	Income Total	Flows Total	HH Total	Type
01/01/2014	Camp1	Cell 1	100	200	20	Type 1
01/01/2015	Camp1	Cell 1	220	340	40	Type 1
01/01/2015	Camp1	Cell 2	120	210	20	Type 1
01/02/2015	Camp2	Cell 1	210	340	50	Type 3
01/01/2016	Camp2	Cell 1	270	420	70	Type 3
01/05/2016	Camp7	Cell3	750	1250	75	Type 2

Now, what I want to do is to find out the year on year change (%) based on the selection of the month. For instance, if I have no selection for campaign or cell and I select Income total as my parameter of interest with selection of touch months 01/01/2016,01/02/2016 and 01/03/2016, I get the Year on Year change W.R.T 2015 for these months and if say I select just may of 2016 as my touch month the Y-o-Y change should reflect just between may 2016 and may 2015.

Is there a way to do it?

Thank you.

P.S: I'm just a few weeks old in terms of the qlik environment.

Edit 1: I'm trying to figure the year on year change for Average Income (i.e, Income Total/HH Total).