Answer:
The ratio of student that completed their homework to the students who didn't complete their homework is 9:6 = 9 /6
Explanation:
9 of 15 students completed their homework .The ratio of students who completed their homework to the ratio that didn't complete their's can be calculated below
The total number of student that was given the homework is 15 . Out of this 15 students only 9 of the students completed their homework. The remaining student out of the 15 didn't complete their's.
The remaining number of student that didn't complete their homework is 15 - 9 = 6 .
Therefore,
The ratio of student that completed their homework to the students who didn't complete their homework is 9:6 = 9 /6
The ratio can be further reduced to 3/2