There were 267,841 households out of which 39.4% had children under the age of 18 living with them, 35.4% were married couples living together, 25.3% had a female householder with no husband present, 5.8% had a male householder with no wife present, and 34.4% were non-families. 28.9% of all households were made up of individuals and 9.0% had someone living alone who was 65 years of age or older.  The average household size was 2.61 and the average family size was 3.24. Same-sex couple households comprised 0.8% of all households.. How many more households had children under the age of 18 than male householders with no wife present and someone living alone over the age of 64, in percent?