How do I get two years back month year date from given month year date in oracle

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SQL

Oracle

I have date in month year format as given below

3/2015
11/2016

I need to get a date which is 2 year back this date
3/2013
11/2014

I used the following code but its not generating right results

SELECT A.*,TO_DATE(A.MONTH_DATE,'MM/YYYY') FROM tmp_freq_cashin_8 A;

What I have tried:

I used the following code

<pre><pre lang="SQL">

SELECT A.*,TO_DATE(A.MONTH_DATE,'MM/YYYY') FROM tmp_freq_cashin_8 A;