Table:
after-tax low income rate
average after-tax low income gap ratio

including witb
excluding witb
difference
including witb
excluding witb
difference

percent

total population
17.7
17.8
0.1
39.0
39.5
0.5

witb population
56.3
58.3
2.0
28.5
30.9
2.4

female lone-parent family
42.2
42.9
0.7
39.9
40.2
0.3

witb female lone-parent family
53.7
57.2
3.5
24.8
26.6
1.8

Statement: the low-income gap ratio was 28.5% for witb population.
Question: what is the low-income gap ratio for witb population?
Answer: [28.5]