Calculating month difference in Query activity

Hi

There is a requirement to find the month difference and what all the values in the month difference should be subtracted from 10.
For example, if the month difference is 3, the result should 10-3.
The answer will be 7, so I'd have to query in query activity

FYI-There is an attribute called date, and it has a date datatype. I tried below approach  , and to continue, I need to subtract from 10.