Question

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?

-31 books per month

-18 books per month

-11 books per month

-7 books per month

Answer 1

What do you get when you subtract 157-102?

Answer 2

55

Answer 3

So 55 is the total number of books he donated

Answer 4

thats not a choice

Answer 5

Since were trying to find out how many book he donated between month 3 and month 8, we would see how months are between them. Any idea?

Answer 6

I know it's not a choice.

Answer 7

He has been donating books for 5 months...

Answer 8

5/55=11

Answer 9

11 is a choice.