My question is: The price of a book was $400. If the book's price is decreased by 15% and then increased by 40%, what is the final price of the book? Your thoughts:
When the price of the book is decreased by 15%, the total price decrease is 15 / 100 * $400 = $60. The new price of the book becomes $400 - $60 = $340. The price of the book is then increased by 40 / 100 * 340 = $136. The final price of the book is $340 + $136 = $476. The final answer: 476.