3/5 of jills 30 page photo album is full. She wants to set aside 1/4 of the pages that are left for photos of her vacation. How many pages can she fill before her vacation?

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