Question

If the first chapter of a certain book is 40 pages long and makes up 20% of the book, how many pages does the entire book have?

Answer 1

Answer:

200

Step-by-step explanation:

20% of a book = 40 pages

100% of a book = x pages

20/100 = 40/x                Cross multiply

20x = 100*40                 Combine the right

20x = 4000                    Divide by 20

20x/20 = 4000/20         Do the division

x = 200                           Answer