Lori has 60% of the book to read. If she has read 120 pages how many pages does she still have to read

Ok, so 120 pages plus the 60% of the book she has left to read will give the total number of pages.

That means that 120 pages is 40% of the book.

Make a proportion

120/40% = x/60%

72 =.4 x

x = 180 pages

40% of he book. So 180 pages