Answer:
...Jacob read 21 pages from a book on Saturday. He read 5/9 of the rest on Sunday. He still had a third of the book to read.
1. How many pages were there in the book?
x= the number of pages
21+5x/9+x/3 =x
(189+5x+3x)/9=9x/9
8x+189=9x
8x-9x=-189
x=189
there were 189 pages
2. ratio between the number of pages read on Saturday=21/189=1/9 and the number of pages read on Sunday.= on Sunday he read 5/9 i.e. (189*5)/9=105 pages
ratio: 105/189=5/9
Explanation: