Please explain this questiom

Chapter 2 is 40% in the pie chart, as the problem says. The other percentages need to be adjusted based on the information in the problem.
How do we find the other 3 percentages? We know the number of pages in each chapter, but we don't know what % is 1 page. One way to find it is to first find a certain number of pages for which the % is known.
 
All question data is mentioned in picture provided.. kindly help to solve
 
You do not understand how this site works. We provide help rather than answers. We do that by asking you the kind of questions you need to ask yourself in order to solve this type of problem.

What percentage of the book is not in chapter 2?

How many pages are not in chapter 2?

How might use that information to determine how many pages are in the book?
 
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