Penny reads 12 pages in 1/4 of an hour. what is the unit rate of pages per hour, and what is the unit rate of hours per page? i know the unit rate of pages per hour is 48, but i am stuck on the unit rate of hours per page. i'm coming up with .020833. .

You already know the unite rate of pages per hour.....So, all we need to do is find the unit rate of hours per page.

Now, you said that the unit rate of pages per hour is 48.

Which means Penny reads 48 pages in 1 hour.

Now, 
You can do this problem by two methods.....one is ratio and proportion and other is unitary method.

First, let us use unitary method.

Using unitary method,
Penny reads 48 pages in 1 hour.

Penny reads 48 *  pages in 1* hour.

Penny reads 1 pages in   hour.
This is your answer....

Now, let me show you the ratio and proportion method:
According to the question,

48 pages = 1 hr.
1 page = x hr.

Using ratio and proportion,


So, basicallly you get the same answer using both method......
If you want to the answer in decimals, the answer would be 0.020833.... hour.