Answer :
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