WASHINGTON — The average rate on a 30-year fixed-rate mortgage in the U.S. fell to 6.74 percent, the first decline in five weeks, according to Freddie Mac. Other rates also dropped.

The 30-year rate declined from last week's average of 6.79 percent, and compares with 5.66 percent a year earlier.

The one-year adjustable rate fell to 5.75 percent from 5.83 percent, Freddie Mac said. The 15-year fixed rate decreased to 6.37 percent from 6.44 percent.

Rates are for the week ending yesterday.

Freddie Mac is the second-biggest purchaser of U.S. mortgages. Fannie Mae is the largest.