Nate had read 400 x 20/100 = <<400*20/100=80>>80 pages.

So, he still needs to read 400 - 80 = <<400-80=320>>320 pages to finish the book.

# Answer

320
Question:
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?
Answer:
Let's think step by step.

user
320
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?
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