sally can read 15 pages of a book in 1/8 of an hour . what is sally's rate of pages per hour ?
to find the rate you need to divide 15 by 1/8 and you get 120 pages per hour as your answer
so If she can read 15 pages in 1/8 of an hour . Then you would know that in 1 hour she would read 8 x as many as she reads in 1/8 of an hour . so the answea would be 8 x 15 = 120 pages