Answer:
88
Step-by-step explanation:
108 ÷ 3 = 36 = number of girls in the club.
108 + 36 = 144 = total number of people in the club.
(144 ÷ 9) x 2 = 32 = total number of runners in the club
32 x 3/8 = 12 = number of runners who are girls
32 - 12 = 20 = number of boys who are runners
108 - 20 = 88 = number of boys who are swimmers
