Richard can read of a book in of an hour. At this rate, how much can Richard read in one hour?

To find the amount that Richard can read in one hour, we need to multiply the amount he can read per minute by the number of minutes in an hour, which is 60 minutes.

Reading 3/4 of a book in 1/2 of an hour means he can read (3/4) / (1/2) = 3/4 * 2/1 = 6/4 = <<3/2=1.5>>1.5 books in one hour.

Therefore, Richard can read 1.5 books in one hour.