Answer:
the correct answer is A. 4/9
Explanation:
first you need the total number of students, so add 15+12 and you get 27, then because the ratio is the number of girls to the total number of students, (# of girls/ total # of students) the numerator is 12 (# of girls) and the denominator is 27 (total # of students) so 12/27, then simplify that to the lowest form without having to go into decimals and you get 4/9