Answer:
the answer is 1.5 or 1 1/2
Step-by-step explanation:
you can see he reads more than 1 book per month. when you subtract 12 from 18 you have 6 books remaining. divide months 12 by books 6 and you get 2. 6x2= 12 so 6 is half of 12 so its 1.5 hope this helped