House Hack Percentage

[Alan Berlin]

I'm setting up my first 1031 exchange on a duplex sale that I lived in part of. The house was two units but they are not equal size. I'd estimate that our unit was %65 of the house. Does it go by percent of square footage or number of units or some other calculation? How do I determine the percentage that has to go into the 1031?

Thank you,

Alan