There are 8 girls per 15 campers because 8 divided by 7 boys and 8 girls. The proportion is 8/15. If there are 195 campers, then you are looking for the number of girls, so 8/15 = x/195, where x is the number of girls. Solve for x. 15x = 8(195) 1560 = 15x x = 104 104 girls. Number of boys = y, 195-104=y y = 91