OK. So. 10 kids own a dog. 14 do not. The ratio of children who DO own a dog to the number who DON'T would be 10:14.
To simplify, what is the biggest number that goes into both 10 and 14? 2. So divide 10 and 14 by 2 to get your simplified fraction
10÷2=5
14÷2=7
ANSWER====> 5/7