Then/Now You solved proportions. (Lesson 2–6) Find the percent of change. Solve problems involving percent of change.

Slides:

Advertisements

Similar presentations

Advertisements

Write an equation and solve. Round to hundredths as needed.

EXAMPLE 1 Finding a Sale Price You are shopping for a guitar and find one with an original price of $160. The store is offering a 30% discount on all guitars.

The ingredients in the recipe will make 4 servings of frozen yogurt. Determine the following: If you want to make 8 servings, what would you do to the.

7 th Grade Math Ms. Richardson.  Before, we answered all types of percent questions using proportions.  However, when you are finding the percent of.

Finding a percent of a number Textbook pages

Do Now What number is 12% of 350? 21 is what percent of 40?

Percent of Change We can find percents of increase and decrease and solve problems involving percents of change.

USING PERCENTS AND CALCULATING PERCENT CHANGE Objectives: SWBAT do calculations using percents. SWBAT find percents of increase and decrease. SWBAT use.

Over Lesson 7–5 A.A B.B C.C D.D 5-Minute Check 6 A.9.4% B.1.06% C.5.7% D.6% Taneesha bought a laptop for $ including tax. The laptop had a price.

Lesson 1-1 Example Example 1 Karen bought a dress that cost $32. She paid 7% in sales tax. How much did she pay in tax? 1.Write the percent proportion.

Percent Increase and Decrease

Lesson 3.7- Percent of Change, pg. 160

Chapter 23 Review Adv. Math. Find the % of the number. 75% of 120.

Algebra 1 Section Objectives I can find percent of increase or decrease in story problems.

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) CCSS Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example:

2-8 Percents Lesson Presentation Lesson Quiz Holt Algebra 1.

Lesson 3-7 Percent of Change.

Lesson 7 MI/Vocab percent of change percent of increase percent of decrease Find percents of increase and decrease. Solve problems involving percents of.

Target: Solve problems involving mark-ups, discounts, tips and sales tax.

Finding a percent of a number Textbook January 13 th 14 th, 15 th, 16th.

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example: Percent.

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) CCSS Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example:

Over Lesson 2–6. Then/Now You solved proportions. Find the percent of change. Solve problems involving percent of change.

Lesson 2-7 Percent of Change.

Sales Tax, Discounts, and Commissions Section 6.7.

Percent Increase and Decrease

Ratio —comparison of 2 quantities by division Written using to, :, fraction Ex: 10 to 15, 10:15, 10/15.

WEEK 13 Discounts. DO NOW (3 MINS) PKB (PRIOR KNOWLEDGE BOX) Topic: DiscountsMisconceptions Complete this side only. List anything that you know about.

Lesson 6-8 Warm-Up. Lesson 6-8 Warm-Up Markup and Discount (6-8) What is “markup”? How do you find the percent of markup ? markup (also known as profit):

Then/Now You have already solved real-world problems using the percent proportions. (Lesson 7–3) Solve real-world problems involving markup and discount.

3-7 Percent of Change Objective: Students find percents of increase and decrease and solve problems involving percents of change. S. Calahan 2008.

Markup and Discount 6.5. markup Markup = (% of markup) (store’s cost)

Bell work Solve. Round to tenth as needed. 1)What is 75% of $82? 2)What is 42% of $170? 3)What is 5.5% of $24? 4)What is 80% of $15.99?

To Start – 10 Points!!! Find the percent of increase from 4 to 7.5. Amount of increase = 7.5 – 4 = 3.5 Original amount = 4 The percent of increase from.

 Percent of Change – the ratio of the change in an amount to the original amount expressed as a percent.  Percent of Increase – the new number is greater.

Markup and Discount 6.9. markup Markup = (% of markup) (store’s cost) Turn the percent into a decimal or fraction.

Do Now In the real world, when I buy a watch that is marked as $39.00 is that all I have to pay? If not why?

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 7–5) Then/Now New Vocabulary Key Concept: Percent of Change Example 1: Find the Percent of Change.

Splash Screen. Over Lesson 2–6 5-Minute Check 1 A.yes B.no.

Splash Screen. Then/Now You have already solved real-world problems using the percent equations. (Lesson 7–5) Solve real-world problems involving markup.

Section % of what number is 75? 2. What percent of 25 is 4? 3. If you buy a shirt that was originally $45 but it is on clearance for 25% off,

ALGEBRA READINESS LESSON 7-5 Warm Up Lesson 7-5 Warm-Up.

Markup and Discount 6.6. markup Markup = (% of markup) (store’s cost)

Splash Screen. Then/Now You solved proportions. Find the percent of change. Solve problems involving percent of change.

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) CCSS Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example:

Finding Percent.

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) CCSS Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example:

Splash Screen. Lesson Menu Five-Minute Check (over Lesson 2–6) CCSS Then/Now New Vocabulary Example 1:Percent of Change Example 2:Real-World Example:

Percent Proportions & Equations. A percent is a ratio that compares a number to 100. A commission is a percent of the amount of your sales. A percent.

EXAMPLE 1 Finding a Sale Price Clothing You buy a pair of jeans that is 30% off the original price of $29. What is the sale price? STEP 1 Find the amount.

PERCENT OF CHANGE Mrs. Herron. I CAN…  Solve problems involving percent of change.

Ratios and Proportions, Percent of Change Objective: Compare ratios. Solve proportions. Find the percent of change. Solve problems involving percent of.

6.6 Discounts and Markups 10/27/15. Discount How much an item’s price is reduced by.

RED 2012 BOOK. 4.3 Activity You can find 10% and multiply by the correct amount.  Ex: 40% off of $50.00  10% is $5.00.  $5.00 X 4 (for 40%) = $20.00.

PERCENT OF CHANGE. WHAT IS THE PERCENT OF CHANGE? The amount stated as a percent that a number increases or decreases.

Main Idea and New Vocabulary Example 1: Real-World Example

Finding Percent of Change

EXAMPLE 1 Finding a Sale Price

Welcome to Interactive Chalkboard

Percent Increase and Decrease

2-7 Percent of Change Percent of Change: what % something changes

2-7 Notes for Algebra 1 Percent of Change.

Percents and Equations

Finding Discount Objective: Students will calculate percentages and find the amount of discount.

Main Idea and New Vocabulary Example 1: Real-World Example

Presentation transcript:

Then/Now You solved proportions. (Lesson 2–6) Find the percent of change. Solve problems involving percent of change.

Vocabulary percent of change percent of increase percent of decrease

To find the percent of change, use the following equation: Difference in the amounts x 100 original amount Find the amount of change between 25 days and 30 days.

Example 1A Percent of Change A. Determine whether the percent of change is a percent of increase or a percent of decrease. Then find the percent of change. original: 32 new: 40

Example 1B Percent of Change B. Determine whether the percent of change is a percent of increase or a percent of decrease. Then find the percent of change. original: 20 new: 4

Example 1B Percent of Change Find the percent using the original number, 20, as the base. Answer: The percent of decrease is 80%. change original amount percent of change 100 percent 16(100)= 20(r)Find the cross products. 1600= 20rSimplify. Divide each side by = rSimplify.

A.A B.B C.C D.D Example 1A A. Determine whether the percent of change is a percent of increase or a percent of decrease. Then find the percent of change. original: 20 new: 18

A.A B.B C.C D.D Example 1B B. Determine whether the percent of change is a percent of increase or a percent of decrease. Then find the percent of change. original: 12 new: 48

Example 2 Percent of Change SALES The price a used-book store pays to buy a book is $5. The store sells the book for 28% above the price that it pays for the book. What is the selling price of the book? Let s = the selling price of the book. Since 28% is the percent of increase, the amount the used-book store pays to buy a book is less than the selling price. Therefore, s – 5 represents the amount of change. change book store cost percent of change 100 percent

Example 2 Percent of Change (s – 5)(100) = 5(28)Find the cross products. 100s – 500 = 140Distributive Property 100s – = Add 500 to each side. 100s = 640Simplify. Answer: The selling price of the $5 book is $6.40. Divide each side by 100. s = 6.4Simplify.

A.A B.B C.C D.D Example 2 At one store the price of a pair of jeans is $ At another store the same pair of jeans has a price that is 22% higher. What is the price of jeans at the second store?

Example 3 Sales Tax SALES TAX A meal for two at a restaurant costs $ If the sales tax is 5%, what is the total price of the meal?

A.A B.B C.C D.D Example 3 A portable CD player costs $ If the sales tax is 6.75%, what is the total price of the CD player?

Example 4 Discounts DISCOUNT A dog toy is on sale for 20% off the original price. If the original price of the toy is $3.80, what is the discounted price?

A.A B.B C.C D.D Example 4 A baseball cap is on sale for 15% off the original price. If the original price of the cap is $19.99, what is the discounted price?