As people are living longer and the world's population is increasing, there are more and more people ages 65 or older. In 2000, approximately 419 million people were 65 or older. By 2017, that number increased to 656 million. On the two questions below,
round to the nearest tenth when relevant.
a. What was the absolute change in the number of people 65 or older from 2000 to 2017?
b. What was the relative change in the number of people 65 or older from 2000 to 2017?