A group of 30 students were surveyed about their favorite subject and gender. The results are shown in the table below.
| Subject / Gender | Boys | Girls | Total |
|---|---|---|---|
| Math | 6 | 4 | 10 |
| English | 12 | 8 | 20 |
| Total | 18 | 12 | 30 |
What fraction of the students who prefer Math are boys?
