Year Over Year Comparison for Multiple Years

Question

I have a business request where the client is asking for a year over year percentage comparison for multiple years
So for example
          Applications
2015     5
2014     10
2013     22
So in year 2015 we can see that applications is currently down (5-50/10 - [New-Old/Old] by -50% compared to year prior
In year 2014 we are down -55%
Ultimately I wanted to display the following
          Applications
2015     -50%
2014     -55%
2013    
I have an idea of how to do this for a single year, where a presentation variable is fed in then I can just do this year minus previous year.
I was wondering, how can I do this calculation or presentation in OBIEE? Can this be done within answers? Or does something need to be done in the RPD?

Answer 1

As long as your model is correctly done with a time hierarchy you can just use the time series function AGO to get the value of previous year.
So in the formula you can calculating your delta in % comparing the current year amount and the previous one.
You can do it in the analysis directly, but if you will often need to access "previous year measures" would be a good idea to add it in the RPD so you don't need to write the formula every single time.