Question

In the seventh grade , Rachel read 15 books. In eighth grade , she read 18 books. Find the present of increase in the number of books Rachel read

Answer 1

I'd say what you would do is: You can either 1. Add 15 and 18 together and then divide by 2 OR 2. Since there is a 3 number difference between 15 an 18, just add 3 to 18