Percent Change and Real-World Applications

The video tutorial covers various mathematical concepts related to percentages, including calculating percent change, retail prices with markups and markdowns, earnings with commission, and expenses as a percentage of income. It also provides real-world examples of how percentages are used, such as in sales tax, discounts, and tips. The tutorial uses practical examples and calculations to illustrate these concepts, making it easier for students to understand and apply them in real-life situations.

What is the formula to calculate percent change?

• Small number minus big number divided by the second number, then multiply by 100

• Big number minus small number divided by the first number, then multiply by 100

• Big number plus small number divided by the first number, then multiply by 100

• Small number plus big number divided by the second number, then multiply by 100

If a value changes from 50 to 35, what is the percent change?

• 30% decrease

• 30% increase

• 15% decrease

• 15% increase

How do you calculate the retail price after a 15% markup on $60?

• $60 - ($60 * 0.85)

• $60 + ($60 * 0.85)

• $60 - ($60 * 0.15)

• $60 + ($60 * 0.15)

What is the final price after a 22% markdown on $50?

• $39

• $44

• $50

• $28

Mailing earns a weekly salary of $325 plus a 6.5% commission on sales. How much does she earn if she sells $4800 worth of merchandise?

• $312

• $480

• $325

• $637

Ramon spends $53.10 on electricity each month. If his monthly earnings are $1735, what percentage of his earnings is spent on electricity?

• 3.1%

• 2.5%

• 3.5%

• 4.0%

If James makes $7 per hour and Priya makes 20% more, how much does Priya make per hour?

• $8.40

• $7.20

• $9.00

• $8.00

The Hugh family goes out for lunch, and the meal costs $45 with a 6% sales tax and a 20% tip. What is the total cost of the meal?

• $56.70

• $50.00

• $55.00

• $60.00

Which of the following is an example of a percent increase?

• Markdown

• Sales tax

• Rebate

• Discount

What is an example of a percent decrease in real-world applications?

• Markup

• Sales tax

• Tip

• Discount