Eve purchased her home in 2014 for $350,000. She was able to put $50,000 as a down payment and borrowed $300,000 from 1st National Bank. Eve refinanced her loan in 2020, when she had $240,000 remaining on her mortgage. She was able to refinance $280,000, paying off her loan and using the extra $40,000 to purchase a new Toyota Corolla. Calculate the percentage of loan interest payments that are tax deductible