Kareem can read 126 pages of his book in 7 days.
I attached my work in the image below because it involves too many fractions to type out. Essentially, you’re going to want to set up a proportion to find the amount of pages he can read in one day (which ends up being 18.) Once you have the number of pages he can read in one day, multiply that by the number of days in the question (7.) 7 x 18 = 126.
Hope this is helpful & accurate!