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A book's price is increased by 15% to $23. What was the original price of the bo

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Question: A book\'s price is increased by 15% to $23. What was the original price of the book?

Options:

  1. $20
  2. $21
  3. $22
  4. $19

Correct Answer: $20

Solution: 

Original Price = New Price / (1 + 0.15) = 23 / 1.15 = $20.

A book's price is increased by 15% to $23. What was the original price of the bo

Practice Questions

Q1
A book's price is increased by 15% to $23. What was the original price of the book?
  1. $20
  2. $21
  3. $22
  4. $19

Questions & Step-by-Step Solutions

A book's price is increased by 15% to $23. What was the original price of the book?
  • Step 1: Understand that the new price of the book is $23 after a 15% increase.
  • Step 2: Recognize that a 15% increase means the original price was multiplied by 1.15 to get the new price.
  • Step 3: To find the original price, you need to divide the new price by 1.15.
  • Step 4: Calculate the original price by doing the math: 23 divided by 1.15.
  • Step 5: The result of the calculation is $20, which is the original price of the book.
  • Percentage Increase – Understanding how to calculate the original price after a percentage increase.
  • Basic Algebra – Applying algebraic manipulation to isolate the original price.
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