Lizzy: Nate is reading a 400-page book. He finished reading 20% of the book. How many pages does he need to read to finish the book?.
Me: Hmmm, let me think. I think this is the detailed solution:
User
Nate had read 400 x 20 / 100 = 80 pages. So, he still needs to read 400 - 80 = 320 pages to finish the book. Final answer: 320.
Assistant