1 / 13

Applications of Percent

Applications of Percent. Section 3.11 & 3.12. DMA 030. Percent Increase or Decrease. To find the percent increase or decrease: Subtract the smaller number from the larger to find the amount of increase or decrease.

petra
Download Presentation

Applications of Percent

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Applications of Percent Section 3.11 & 3.12 DMA 030

  2. Percent Increase or Decrease • To find the percent increase or decrease: • Subtract the smaller number from the larger to find the amount of increase or decrease. • Find what percent the amount of increase or decrease is of the original amount.

  3. Example (Percent Increase) • Refer to the table below and find the percent increase in the number of news/talk radio stations from 2004 to 2011. Subtract to find the difference b/w the two years 1,453 – 1,285=168 2. Percent Equation Method 168 is what percent of 1,285 168 = x · 1285 x = 0.13 Percent Increase is 13% NOTE: percent of increase(decrease) is a percent of the original number before the change occurred.

  4. Example (Percent Decrease) • A college student’s good grades earned her a student discount on her car insurance premium. Find the percent of decrease if her annual premium was lowered from $1,050 to $924. $1,050 - $924 = 126 126 is what percent of $1,050 126 = x · $1,050 x= 0.12 x = 12%

  5. Sales Tax • The sales tax on an item is a percent of the purchase price of the item Sales tax = sales tax rate · purchase price Amount = percent · base

  6. Example • Find the sales tax on a purchase of $64.50 if the sales tax rate is 7%. Sales tax = sales tax rate · purchase price = 7% · $64.50 = 4.515 Sales tax = $4.52

  7. Total Price • The total price of an item is the sum of its purchase price and the sales tax on the item. Total Price = purchase price + sales tax

  8. Example • Find the total price of a $619.50 refrigerator if the sales tax rate on the purchase is 2.8%. Sales tax = sales tax rate · purchase price = 2.8% · $619.50 = $17.35 Total Price = purchase price + sales tax = $619.50 + $17.35 = $636.85

  9. Commission • The amount of commission paid is a percent of the total dollar sales of goods or services. Commission = commission rate· sales amount = percent · base

  10. Example • A real estate agent earns a 3% commission on all sales. Find her commission if she sells a house for the listing price of $212,000. Commission = commission rate· sales = 3% · $212,000 = $6,360

  11. Discount • The amount of discount is the difference between the original price and the sale price. Amount of discount = original price – sale price Amount of discount = discount rate · original price

  12. Sales Price • To find the sale price of an item, subtract the discount from the original price. Sale Price = original price – discount

  13. Example • Find the amount of the discount on a pair of hiking boots if they are normally priced at $124.60, but are currently on sale for 15% off. Then find the sale price. Amount of discount = discount rate · original price = 15% · $124.60 = $18.69 Sale Price = original price – discount = $124.60 - $18.69 = $105.91

More Related