Give the step-by-step reasoning process and then the final answer. 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?
Nate had read 400 x 20 / 100 = 80 pages. So, he still needs to read 400 - 80 = 320 pages to finish the book.
The final answer: 320.