Tax Deductions on ADU

[Ken Ben]

I am considering to buy a home with a built in ADU in CA.

Can i deduct a part of property tax and mortgage interest of the property as an expense for maintaining an ADU?

So for eg: Total Property value in 1M (75% main home 25% ADU) my annual interest payment is $24K and annual tax is %12K, can i deduct 25% of both as an expense of owning and maintaining rental property (ADU). Meaning can i deduct 25% of $36000, which is $9000 as an expense of owning/maintaining ADU?