A high school surveyed students to determine if new foreign language classes should be added to the course offerings for the next school year. The two-way frequency table below shows the interest of next year's underclassmen in the new courses.
German Mandarain Neither Total
freshmen: 30 80 230 340
Sophomores: 15 65 200 280
Total: 45 145 430 620
Approximately what percentage of the underclassmen have an interest in taking a Mandarin course next year?

44.83%

33.72%

23.39%

55.17%