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If a book costs $15 and is on sale for 20% off, what is the sale price?

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Question: If a book costs $15 and is on sale for 20% off, what is the sale price?

Options:

  1. $12
  2. $10
  3. $11
  4. $13

Correct Answer: $12

Solution: 

The discount is 20% of $15, which is 0.2 × 15 = $3. Therefore, the sale price is $15 - $3 = $12.

If a book costs $15 and is on sale for 20% off, what is the sale price?

Practice Questions

Q1
If a book costs $15 and is on sale for 20% off, what is the sale price?
  1. $12
  2. $10
  3. $11
  4. $13

Questions & Step-by-Step Solutions

If a book costs $15 and is on sale for 20% off, what is the sale price?
  • Step 1: Identify the original price of the book, which is $15.
  • Step 2: Determine the discount percentage, which is 20%.
  • Step 3: Convert the percentage to a decimal by dividing by 100. So, 20% becomes 0.2.
  • Step 4: Calculate the amount of the discount by multiplying the original price by the decimal. So, 0.2 × 15 = $3.
  • Step 5: Subtract the discount from the original price to find the sale price. So, $15 - $3 = $12.
  • Percentage Calculation – Understanding how to calculate a percentage of a given amount.
  • Subtraction – Performing subtraction to find the final sale price after applying the discount.
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