Answer:
The answer is 21
Step-by-step explanation:
This should help you
After Jen read 4/5 (12/15) of a book there was 1/5 left.
The next day she reads 2/3 of 1/5 which equals 2/15 of the book
So by 2 days 14/15 of the book is read and there is 1/15 left.
