At a restaurant the ratio of kids meals sold to adult meals sold was 5 : 4. if there were 20 kids meals sold, what was the combined amount of kids and adult meals sold?

For every 5 kids meals sold, there are 4 adult meals sold. So divide 20 by 5 and then multiply it by 4. That's 4 times 4, which is 16. Add 16 to the original 20, and your answer will be 36.