A class has 18 boys and 12 girls. The teacher calls on students at random to recite. What is the probability that the first student called to recite is either a boy or a girl? (Express your answer in...

A class has 18 boys and 12 girls. The teacher calls on students at random to recite. What is the probability that the first student called to recite is either a boy or a girl? (Express your answer in percentage rounded off to the nearest hundredths, no need to include the percent sign)