Izzys dog is 10 1/2 years old. Car end dog is 18 months old. How many years older is Izzys dog.

12 months in a year. So 18 months = 1 year and 6 months. Izzys dog is 10 1/2 = 10 years and six months. Then subtract 1 year and 6 months by 10 year and six months and it would be exactly 9 years older.