Linda read 1/5 of a book on Friday and 2/7 of the book on Saturday. On Sunday she read 5/9 of the remaining pages. What fraction of the book did she read on Sunday?

First you add the fraction of the book she read on Friday and Saturday.

1/5 + 2/7 = 7/35 + 10/35 = 17/35

Okay this means that on Friday and Saturday, she finished 17/35 of the book.

The next part says that she read 5/9 of the pages that remain. So first we need to find how much is the remaining book by subtracting the number we found above from 1.

1 - 17/25 = 35/35 - 17/35 = 18/35

This shows us that she still has 18/35 of the book to go.

Now, in order to find 5/9 of this, we just multiply it by 5/9.

18/35 * 5/9 = 2/7

Now this means on Sunday, she read 2/7 of the book.