A story book, Xiao Hong read half of the book on the first day, the next day read the remaining one-third, there are 48 pages left. How many pages are there in this book?
Let this book be x in total
A: the book has 144 pages
Xiao Hong read a story book. On the first day, she read 30% of the total pages. On the second day, she read 10 pages, leaving 3 / 5 of the total pages?
Three fifths = 60%
1 = 100 (page)
NEXT: Xiao Ming read a story book. On the first day, he read 1 / 5 of the whole book. On the second day, he read 1 / 2 of the whole book. There are still 33 pages left. How many pages are there in this book