Daniel has read 180 pages this is 80% of the entire book how long is the book

225 pages, its correct answer i did the math

180/80
x    /100
cross multiply;
180*100=18,000
divide with the amount left
18,000/80=225                                                              

If we take these numbers we can set it up in crops multiplication form to find the

80. 180
—— = ——- then we cross multiply
100 x making 80x= 18000 then divide 18000 and 80 to get 225 meaning x=225 so Daniels book is 225 pages long