Question

There are
11
apples in a basket.
5
of these apples are green. The rest of them are red
What is the ratio of green apples to red apples?

Answer 1

5:6

If there are 11 in total and 5 are green then 11-5=6 which is how many red apples you have.

If you need a ration of green:red it would be 5:6

Answer 2

11 total apples, minus 5 green apples. 
So, you have 6 red apples. 
That means the ratio is 5:6