The average interest rate on a 30-year fixed-rate mortgage dropped to 4.95% this week from 4.97% last week, Freddie Mac said Thursday.

The mortgage giant’s weekly survey asks lenders what rates they were offering — and the upfront fees they would charge — for borrowers with good credit and a 20% down payment. Upfront fees averaged 0.7% of the loan amount.

The average rate offered on 15-year fixed-rate mortgages, popular as a refinance loan for borrowers wanting to pay off their mortgages faster, was 4.32%. That was down from 4.33% a week earlier, with 0.7% paid to the originator.

The five-year Treasury-indexed hybrid adjustable-rate mortgage, which has a fixed rate for five years before becoming variable, averaged 4.05% this week with 0.6% of the loan balance paid to the lender. That was down from 4.11% last week, Freddie Mac said.