Answer :
3/5 x 30 = 18 pages.
18 pages are filled.
30 - 18 = 12
12 pages are not filled.
1/4 x 12 = 3 pages
She wants to set aside 3 pages for her vacation.
12 - 3 = 9
She needs to fill up 9 pages before her vacation.
Answer: 9 pages
18 pages are filled.
30 - 18 = 12
12 pages are not filled.
1/4 x 12 = 3 pages
She wants to set aside 3 pages for her vacation.
12 - 3 = 9
She needs to fill up 9 pages before her vacation.
Answer: 9 pages