Question

If the first chapter of a certain book is 42 pages long and make up 2% of the book, how many pages does the entire book have?

Answer 1

Percentages

Suppose the entire book has X pages.

2% of X is:

2*X/100 = 0.02X

We are told this is equivalent to 42 pages, thus:

0.02X = 42

Solving for X:

X = 42/0.02

X = 2,100

The book has 2,100 pages