Can Someone please help me Calculate Year and months

The input should come from the date field and the output should include the year and the months in decimal. for example: Input 03/05/2016  the output: 6,5.

.

value: if(
                    a!isNullOrEmpty(ri!dealerBusiness.dateOrganized),
                    null,
                    /*calculate the age of the person*/
                    int(right(today(), 4)) - (
                      right(ri!dealerBusiness.dateOrganized, 4)
                    )
                  ),

This what I have so far.

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