Answer: 4:3
Step-by-step explanation: so firstly we will see the common factors of 24 and 18.
the factors of 24 is 1, 2, 3, 4, 6, 8, 12, 24
the factors of 18 is 1, 2, 3, 6, 9, 18
we can see that the common factors are 1, 2, 3, 6
so the largest common factor is 6
so you divide 24 by 6 and that will give you 4
then you divide 18 by 6 and it will give you 3
so 24:18 simplify =4:3