A minority group with Johnson & Johnson is unhappy with its leadership and are looking to veer the company in a new direction by getting Beth on to the board of directors. Suppose there are 18 directors total with elections staggered evenly over three years (assume there is only one election per year). Suppose further that all shares are owned by either the current leadership or the minority group.

What percentage of the shares must Johnson & Johnson's current leadership have to freeze out the minority group?