How many pages were originally in Sarah's book?

Question

Sarah is reading a book. If she reads 72 pages, then she has 1/4 of the book left to read. (Plz help! :D)

Answer 1

If she has 1/4 of the book to read, she has read 3/4 of the book (1 - 1/4 = 3/4). >> 3/4 of the book is (72 * 3)/4 = 54 pages >> or you can convert 3/4 to a decimal (.75) and multiply times 72