Catherine reads  of a book in the evening. If she reads  of the book in the morning. The fraction of the book she reads is ____________.

The correct answer is:

In this question we are given that Catherine reads  in the evening and  in the morning.
Step1: The total amount of book that Catherine reads can be found by adding the times she read in the morning and the evening
Total Amount = 
=>
=>.
So, the total amount of book that Catherine reads is .