1 / 15

8-10

Using Percents. 8-10. Course 1. Warm Up. Problem of the Day. Lesson Presentation. Using Percents. 8-10. Course 1. Warm Up Find the percent of each number. 1. 75% of 300 2. 93% of 56 3. 32% of 128 4. 9% of 60. 225. 52.08. 40.96. 5.4. Using Percents. 8-10. Course 1.

jonah
Download Presentation

8-10

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. Using Percents 8-10 Course 1 Warm Up Problem of the Day Lesson Presentation

  2. Using Percents 8-10 Course 1 Warm Up Find the percent of each number. 1.75% of 300 2. 93% of 56 3. 32% of 128 4. 9% of 60 225 52.08 40.96 5.4

  3. Using Percents 8-10 Course 1 Problem of the Day A chessboard is 8 squares wide by 8 squares long. Each player has 8 pawns, 1 king, and 7 other pieces. At the start of a game, all the pieces are on the board, 1 piece per square. What percent of the total number of squares have a chess piece? 50%

  4. Using Percents 8-10 Course 1 Learn to solve percent problems that involve discounts, tips, and sales tax.

  5. Using Percents 8-10 Course 1 Insert Lesson Title Here Vocabulary discount tip sales tax

  6. Using Percents 8-10 Course 1

  7. Using Percents 8-10 Course 1 Additional Example 1: Finding DiscountsA clothing store is having a 10% off sale. If Angela wants to buy a sweater whose regular price is $19.95, about how much will she pay for the sweater after the discount? Step 1: First round $19.95 to $20. Step 2: Find 10% of $20 by multiplying 0.10 • 20. (Hint: Moving the decimal point one place left is a shortcut.) 10% of 20 = 0.10 • $20 = $2.00 The approximate discount is $2.00. Subtract this amount from $20.00 to estimate the cost of the sweater. $20.00 – $2.00 = $18.00 Angela will pay about $18.00 for the sweater.

  8. Using Percents 8-10 Remember! To multiply by 0.10, move the decimal point one place left. Course 1

  9. Using Percents 8-10 Course 1 Try This: Example 1A fishing store is having a 10% off sale. If Gerald wants to buy a fishing pole whose regular price is $39.95, about how much will he pay for the pole after the discount? Step 1: First round $39.95 to $40. Step 2: Find 10% of $40 by multiplying 0.10 • 40. 10% of 40 = 0.10 • $40 = $4.00 The approximate discount is $4.00. Subtract this amount from $40.00 to estimate the cost of the pole. $40.00 - $4.00 = $36.00 Gerald will pay about $36.00 for the fishing pole.

  10. Using Percents 8-10 Course 1 • When estimating percents, use percents that you can calculate mentally. • You can find 10% of a number by moving the decimal point one place to the left. • You can find 1% of a number by moving the decimal point two places to the left. • You can find 5% of a number by finding one-half of 10% of the number.

  11. Using Percents 8-10 Course 1 Additional Example 2: Finding Tips Ben’s dinner bill is $7.85. He wants to leave a tip that is 15% of the bill. About how much should his tip be? Step 1: First round $7.85 to $8. Step 2: Think: 15% = 10% + 5% 10% of $8 = 0.10 • $8 = $0.80 Step 3: 5% = 10% ÷ 2 = $0.80 ÷ 2 = $0.40 Step 4: 15% = 10% + 5%. = $0.80 + $0.40 = $1.20 Ben should leave about $1.20 as a tip.

  12. Using Percents 8-10 Course 1 Try This: Example 2 Lita’s dinner bill is $11.95. She wants to leave a tip that is 15% of the bill. About how much should her tip be? Step 1: First round $11.95 to $12. Step 2: Think: 15% = 10% + 5% 10% of $12 = 0.10 • $12 = $1.20 Step 3: 5% = 10% ÷ 2 = $1.20 ÷ 2 = $0.60 Step 4: 15% = 10% + 5%. = $1.20 + $0.60 = $1.80 Lita should leave about $1.80 as a tip.

  13. Using Percents 8-10 Course 1 Additional Example 3: Finding Sales TaxAnn is buying a dog bed for $29.75. The sales tax rate is 7%. About how much will the total cost of the dog bed be? Step 1: First round $29.75 to $30. Step 2: Think: 7% = 7 • 1% 1% of $30 = 0.01 •$30 = $0.30 Step 3: 7% = 7 • 1%. = 7 • $0.30 = $2.10. The approximate sales tax is $2.10. Add this amount to $30 to estimate the total cost of the dog bed. $30 + $2.10 = $32.10 Ann will pay about $32.10 for the dog bed.

  14. Using Percents 8-10 Course 1 Try This: Example 3Erik is buying a blanket for $19.83. The sales tax rate is 8%. About how much will the total cost of the blanket be? Step 1: First round $19.83 to $20. Step 2: Think: 8% = 8 • 1% 1% of $20 = 0.01 •$20 = $0.20 Step 3: 8% = 8 • 1% = 8 • $0.20 = $1.60. The approximate sales tax is $1.60. Add this amount to $20 to estimate the total cost of the blanket. $20 + $1.60 = $21.60 Erik will pay about $21.60 for the blanket.

  15. Using Percents 8-10 Course 1 Insert Lesson Title Here Lesson Quiz 1. Sean’s new jeans are priced at $29.97, but the sale sign reads, “Take 15% off.” About how much will the jeans cost after the discount? 2. The bill for a family dinner comes to $56.78. About how much would a 20% tip be? 3. The price on a book is $12.99. If sales tax is 4%, about how much will its total cost be? 4. Megan wants a new bike. She is happy to see a sign that reads, “All bikes 10% off.” If the original price of the bike was $159.90 and sales tax is 6%, about how much will the total cost of the bike be? About $25.50 About $11.50 About $13.50 About $150

More Related