 
<translate> Nate agụwo peeji 400 x 20 / 100 = 80. Ya mere, ọ ka kwesịrị ịgụ peeji 400 - 80 = 320 iji gụchaa akwụkwọ ahụ. Azịza ikpeazụ ya bụ: 320. <eng> 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. 