Understanding Discounts and Sales Price Calculation

This video tutorial explains how to calculate the sales price of an item after a discount is applied. It covers two examples: a 15% discount on a laptop and a 6% discount on a car. The video demonstrates both mental calculations and the use of a formula to find the discounted price. It emphasizes understanding the concept of percentage and how to convert percentages to decimals for calculations.

What is the first step in determining the sales price after a discount is applied?

• Subtract the discount from the original price.

• Determine the original price.

• Find the percentage of the discount.

• Calculate the sales tax.

How can you mentally calculate 10% of a number?

• Multiply the number by 0.1.

• Move the decimal one unit to the right.

• Move the decimal one unit to the left.

• Divide the number by 10.

What is 15% of $400?

• $100

• $80

• $60

• $40

What is the new price of the laptop after a 15% discount?

• $340

• $360

• $380

• $400

Which formula can be used to calculate the new price after a discount?

• New Price = Original Price + r

• New Price = Original Price - r

• New Price = (1 - r) * Original Price

• New Price = (1 + r) * Original Price

What is 6% of $25,000?

• $1,500

• $1,400

• $1,300

• $1,200

What is the new price of the car after a 6% discount?

• $24,000

• $24,500

• $23,000

• $23,500

How do you convert a percentage to a decimal?

• Multiply by 100

• Divide by 100

• Add 100

• Subtract 100

What percentage of the original price do you pay after a 15% discount?

• 75%

• 80%

• 90%

• 85%

What is the final step in calculating the new price after a discount?

• Add the discount to the original price.

• Multiply the original price by the discount percentage.

• Subtract the discount from the original price.

• Divide the original price by the discount percentage.