The frequency table shows the types of homes in which residents were living in 2015.

2015 Housing Data Type of Home Frequency
- Single-Family Detached 2330
- Single-Family Attached 590
- Small Apartment Building 1662
- Large Apartment Building 1408
- Mobile Home 231
- Other 179

The relative frequency of residents living in mobile homes in 2015 is __________. Answer choices are rounded to the nearest percentage.
a. 23%
b. 8%
c. 4%
d. 36%