Izzy's dog is 10 1⁄2 years old. Paige's dog is 18 months old. How many years older is Izzy's dog?
18 months equals the same as 1 1/2 years. You subtract 1 1/2 from 10 1/2 because you're finding the difference. Your outcome is a 9 year difference. Izzy's dog is 9 years older than Paige's dog.