Before a championship soccer match, Tara and Emek helped stadium staff decide how many seating sections to prepare. The stadium held 30,000 spectators, and advance records showed that 84 percent of the seats had been sold. Tara calculated that 25,200 tickets were sold. Staff also expected 12 percent of ticket holders not to attend. Emek warned that they should not simply subtract 12 percentage points from 84 percent because the 12 percent applied only to sold tickets. Instead, they expected 88 percent of the 25,200 ticket holders to arrive, giving an estimated attendance of 22,176. Each seating section held 1,200 people. Eighteen sections would provide only 21,600 seats, so Tara and Emek recommended opening 19 sections, providing 22,800 seats. This left 624 seats beyond the expected attendance. Stadium staff followed their plan, and when the gates opened, spectators were seated efficiently without preparing far more space than necessary.