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

Slides:

Advertisements

Similar presentations

Advertisements

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.

Ch. 5-7 Percent of change. Ch. 5-7 Vocabulary Percent of change: a ratio that compares the change in quantity to the original amount. Percent of increase:

Drill # A dripping faucet wastes 3 cups of water every 24 hours. How much water is wasted in a week?

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.

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

Estimating With Percents Lesson 6-8. Sales Tax Round the cost of a given item to the nearest dollar. Multiply that estimate by the decimal version of.

Learn to solve problems involving percent of change.

Slide 1 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Percent and Problem Solving: Sales Tax, Commission, and Discount Section7.5.

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:

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

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.

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.

8-5 Sales Tax & Discount Indicator (s)  N8 Develop and analyze algorithms for computing with percent and demonstrate fluency in use. Pages

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)

DO NOW Define: Markup: An increase from the wholesale price of an item to the retail price. Discount: A decrease from the original price of an item to.

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.

Do Now You buy a cell phone that is 20% off the original price of $129. Find the sale price.

Percent of Change Decrease (Discount)

Percent Increase Percent Decrease Problems. There are two ways to do these problems. Using the proportion: Using direct translation. I will solve each.

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,

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

Mr. Sands 6.3.  1.Price x sales tax rate = sales tax --Instead of subtracting like discount you add to the price. 2.Price + sales tax = total cost 3.Discount.

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:

Discount. EX1)A stereo’s regular price is $430. The store is running a sale with a discount of 10%. Find the sale price Step 1Change % to decimal Step.

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.

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

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

Discounts, markups and percent of change

Markup and Discount Notes

6.6 Discounts and Markups 10/18/16.

EXAMPLE 1 Finding a Sale Price

Welcome to Interactive Chalkboard

Discount, sale price, tax, Tip

Using Percents 7-10 Warm Up Problem of the Day Lesson Presentation

6-5 Percent of Change Warm Up Problem of the Day Lesson Presentation

Do Now 4/7/11 Take out HW from last night. Copy HW in your planner.

Unit 6. Day 15..

Percentage applications

Markup and Discount Calculate given percentages of quantities and solve problems involving discounts at sales, interest earned, and tips. Objective:-Students.

5.6 Finding Percent of Change

Math 5-7: Percent of Change

2-7 Notes for Algebra 1 Percent of Change.

Round the discount to the nearest penny.

Lesson Quizzes Standard Lesson Quiz

Learn to solve problems involving percent of change.

Estimating With Percents

Lesson 19 Proportionality Percent Applications.

Chapter 6 Problem-Solving

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

Bell work Week 28 Cost - The price retailers pay to a manufacturer

Finding a Percent of a Number

Assignment 6.9A: 1 – 10, 18, 19.

Percent Change: Percent Increase / Percent Decrease

Sales Tax, Tips, Discounts

Presentation transcript:

2-7 Percent of Change Percent of Change: what % something changes Percent of increase: what % something goes up Percent of decrease: what % something goes down

Find the percent of change Original: 32 New: 40 Is this an increase or a decrease? Goes up – so it is an increase Use the proportion to solve. 8(100) = r(32) 800 = 32r 800/32 = 32r/32 25 = r or r = 25 25% increase

Try this one Original: 20 New: 4 Is it an increase or decrease? Find the percent of decrease. 16(100) = 20r 1600 = 20r 1600/20 = 20r/20 80 = r or r = 80 80% decrease

Find the missing value The price that a used bookstore 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? (x-5)(100) = 5(28) 100x – 500 = 140 100x = 640 X = 6.40 Selling price = $6.40

Sales Tax A meal for two at a restaurant (outside of Oregon) costs $32.75. If the sales tax is 5%, what is the total price for the meal? 5% of $32.75 = 0.05 times 32.75 = 1.6375 Round to 1.64 $32.75 + $1.64 = $34.39

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? 20% of $3.80 = .20 times 3.80 = 0.76 Since it is a discount you subtract. $3.80 - $0.76 = $3.04

Try these – page 113 #1-9 odd 1. Decrease; 50% 3. Increase of 14% 5. 347 miles 7. $16.91 9. $13.37 Homework #16 p. 113 10-36 even, 43-44