Let's find the girl's reading rate: It is:
30 pages
------------ = 3 3/4 pages per day = 3.75 pages/day
8 days
It takes her 28 days to read her novel. To find out how many pages the novel has, we write out:
28 days
-------------------- = # of pages = 105 pages
1 day
--------------
3.75 pages
Another way in which to do this may be shorter and simpler: Write and solve the equation of two ratios:
30 pages p
--------------- = -------------
8 days 28 days
Then 30(28) = 8p, and p = # of pages in novel = 105
