The forms ask for the equity in real estate you own. For the asset portion (not ypur primary residence) just add up the amounts YOU actually own in all of these other real estate properties. Then put that number down. If some are 50%, you will include 50% of their equity. If some are 100%, those will have 100%.
Then just add them up and put on the total.
It really doesn’t matter if you own 5%, 50% or 100%. Why matters is the dollar value in that total equity.