Question

A student reads 3⁄5 of a book in 30 minutes. How much of the book will be read, if the student reads at the same speed for 40 minutes? Write your answer as a fraction of the book.

Answer 1

In 30 minutes he reads 3/5 of the book 
so in 1 minute he reads 3/5 / 30  = 3/150 = 1/50
in 40 minutes he will read 40  * 1/50     = 4/5 

4/5 of the book

Answer 2

The answer would be 24