Megan had 63 books. she gave 1/3 to her friends and kept the rest. how many books did she give away?

As per given by the question,
There are given that the total number of book is 63.
Now,
According to question, Megan gave 1/3 books to her friends
So,
The total number of book that gave to the friends is
[tex]63\times\frac{1}{3}=21[/tex]The total remaining booka is
[tex]63-21=42[/tex]Hence, 21 books did Megan give away.