During the cross-sectional study, two thousand individuals were examined, of which 80 were physically active, and the remaining were physically inactive. From the group of active people, 50 suffered from osteoarthritis of the knees, from the physically inactive persons, 300 suffered from osteoarthritis.

Calculate the odds ratio of developing osteoarthritis in the presence of physical INACTIVITY (exposure factor)

Write your answer to two decimal places. No text needed.