Applications of Percentages

Best Buy purchases a TV at a wholesale price of $400. They mark-up the price by 125% and put it in their store. What is the retail price of the TV at the store?

• $125

• $400

• $525

• $500

• $900

Fry's Electronics is struggling to sell a computer at the full retail price of $800. They put in on sale with a tag that says 30% off. What is the price of the computer on sale?

• $30

• $800

• $560

• $240

• $770

You and your family eat a nice meal at Cheesecake Factory. The dinner bill comes out to $84. You felt like the service was excellent, so you wanted to leave a 15% tip. How much will the meal cost including tip?

• $96.60

• $99

• $15

• $12.60

• $71.40

You work at a Nordstrom's make-up counter. You earn 20% commission on anything you sell. This week you sold $2,000 worth of make-up. How much commission will you earn this week?

• $2,400

• $400

• $20

• $2,020

• $4,000

Best Buy purchases a TV at a wholesale price of $400. They mark-up the price by 125% and put it in their store.  What is the price of the TV at the store? What is the equation that models this relationship? Let x=wholesale price and y=retail price.

•  $y=0.75x$  

•  $y=1.25x$  

•  $y=2.25x$  
  

•  $y=-1.25x$  

•  $y=x+125$  

Fry's Electronics is struggling to sell a computer at the full retail price of $800. They put in on sale with a tag that says 30% off. What is the cost of the computer on sale? What equation models this relationship? Let x=retail price and y=sale price.

•  $y=0.3x$  

•  $y=0.7x$  
  

•  $y=1.3x$ 

•  $y=-0.3x$  

•  $y=x-30$  

You start a YouTube channel. In one month your subscribers go from 50 to 81. What is the percent change of your subscribers?

• An increase of 31 subscribers

• An increase of 81%

• An increase of 31%

• An increase of 62%

• An increase of 162%

An item on Amazon is normally $200, but it is currently on sale at $160. What is the percent discount that they are offering on the item?

• 50% off

• 25% off

• 20% off

• 40% off

• 160% off

You buy a stock at an initial offering price of $5. Over the next year, the stock rises to a price of $30. What is the percent change on the stock over that year?

• An increase of 25%

• An increase of 30%

• An increase of 600%

• An increase of 500%

• An increase of $25

You put $1500 in the bank. The bank assures you that you will earn 3% simple annual interest over the next five years. You make no additional deposits or withdrawals. After five years, what is your account balance at the bank?

• $45

• $225

• $1,545

• $1,725

• $1,275