Pls answer i need urgent 7th grade math fractions

There are 4 and 4/7 that are not advertising because if you change 3 and 1/2 into 7/2 you will then have to divide 16/1 by 7/2 then keep change flip to get 16/1 times 2/7 which you will get 32/7 which you dived to get 4 and 4/7 .She has 64 pages left because if you divide 48/1 by 3/4 you would have to keep change flip and you will get 48 / 1 times 4 / 3 you will get 192/3 which if you divide 192 by 3 you will get 64 which is your answer.