Eric has been donating books he no longer needs to his local library. After 3 months of donating, he had 157 books left in his room. After 8 months of donating, he had 102 books left in his room. How many books per month did Eric donate on average between months 3 and 8?

Question

anonymous · Answer

The time difference between 8 months and 3 months. Is 5 months.
So let's subtract 157-102=55
divide 55 by 5, which is 11. 

So the answer is 11 books per month.

anonymous · Answer

@LegoMyEgo @outrageous22  Great job on answering the question cause I don't even know how to do it

anonymous · Answer

Thank you ShayTay :)

anonymous · Answer

No problem at all