The table below shows the distribution of students in 9th and 10th grade by their favorite subject.
| Grade / Favorite Subject | Math | Science | English | Total |
|---|---|---|---|---|
| 9th | 30 | 25 | 45 | 100 |
| 10th | 40 | 35 | 25 | 100 |
| Total | 70 | 60 | 70 | 200 |
What fraction of the 10th-grade students chose Science as their favorite subject?
