Answer:
I did not now but anobody help you l bless you someone help
Multiply 9 books by 55% by doing
9 x .55 = 4.95
We can't have 4.95 books, though so it rounds down to 4 because you can't just add another .05.
that will be not so shore of what will you think but if you used a thermometer and you see how it will change