8.4 Percent of Increase and Decrease

Slides:

Advertisements

Similar presentations

Find the amount of the markup.

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.

Warm Up 1. 14,000 is 2 % of what number? is 13% of what number? % of what number is 12? % of what number is 189? 560,

6-4 Percent of Change Percent of change = amount of change original amount.

8.4 Percent of Increase and Decrease. Percent change is the ratio of the amount of change to the original amount. Percent increase describes how much.

NS1.6 Calculate the percentage of increase and decrease of a quantity. NS1.7 Solve problems that involve discounts, markups, commissions, and profit and.

warm-up Handout Correcting pen out Monday & Tuesday – wk 2

Two Step Percentage Problems Word problems with a vengence.

Percent Increase and Decrease 6-4 Students will be able to determine percent decrease. Warm Up 1. 14,000 is 2 % of what number? is 13% of what number?

Percent Change: Percent Increase / Percent Decrease

Ratio, Percent, Proportion

Learn to solve problems involving percent of change.

Warm Up Solve % of what number is 6? 2. What percent of 20 is 8? 3. What is 80% of 60? is what percent of 200? 60 40% 48 Course Percent.

Percent Increase and Decrease

Notes 29 Percent of Change 6-4.

HW # 69 - p. 296 & 297 # even AND p. 300 & 301 # 5-12 all, & 15 Warm up Joseph, Ana, Lena, and George chipped in money for a friend’s gift. The gift.

7-7 Sales Tax and Discount. Discounts are like what that we have been talking about? What is a discount?

Evaluating Algebraic Expressions 6-5 Applying Percent of Increase and Decrease Warm Up Warm Up California Standards California Standards Lesson Presentation.

Warm ups: Eric bought a pair of shoes originally priced at $95 for 45% off. He paid $52.25 not including tax. Which equation shows how Eric.

Percent of Change Vocabulary percent of change percent of increase

Percent Increase and Decrease 6-4 Students will be able to determine percent increase. Warm Up 1. 14,000 is 2 % of what number? is 13% of what number?

7-7 Sales Tax and Discount. Discounts are like what that we have been talking about? What is a discount?

THESE SHOULD NOT BE DIFFICULT FOR YOU: 1. Find 30% of Find 28% of 60. Solve for x = x(50) = x(86) is what percent of 80? 6.

Discount and Markup SWBAT find the amount of discount; find the sale price; find the discount rate; find the amount of markup; find the markup rate.

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

Holt CA Course Percent of Change NS1.4 Calculate given percentages of quantities and solve problems involving discounts at sales, interest earned,

Bell Work Movie tickets used to cost $5, now cost $7. Find the percent of change. A percent of change tells how much a quantity has increased or decreased.

Lesson 3- using rules of exponents The exponent, tells the number of times that the base is used as a factor 2 3 is defined as 2 times 2 times 2.

Course Percent Increase and Decrease 6-5 Percent Increase and Decrease Course 3 Warm Up Warm Up Problem of the Day Problem of the Day Lesson Presentation.

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

Percent of Increase and Decrease 6-5 Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day Lesson Quizzes Lesson.

% ∙ $ = commission/sales tax/profit

Pre-Algebra 8-4 Percent Increase and Decrease Our Learning Goal Students will be able to determine and construct fractions, decimals, and percents by understanding.

NS1.6 Calculate the percentage of increase and decrease of a quantity.

Percent of change. Find the percent of change from a 28 to a 21 Step 1: Subtract = 7 Step 2: Make a fraction Difference Original amount 7 28 Step.

Bellwork 1. Find 30% of Find 28% of 60. Solve for x = x(50) = x(86) is what percent of 80? is what percent of 30? 16.8.

Percent of Increase and Decrease

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,

Percent of Change Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day Lesson Quizzes Lesson Quizzes.

8-4 Percent Increase and Decrease Course 3 Warm Up Warm Up Problem of the Day Problem of the Day Lesson Presentation Lesson Presentation.

Warm Up Solve % of what number is 6? 2. What percent of 20 is 8? 3. What is 80% of 60? is what percent of 200? 60 40% 48 Course Percent.

Example 4 Finding an Original Amount Lamps A furniture store marks up the wholesale price of a desk lamp by 80%. The retail price is $35. What is the wholesale.

Markup – the amount of money a store increases the price of the goods above what they pay for it. Wholesale price – the amount of money a store pays for.

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

Percent of Change Vocabulary percent of change percent of increase

Percent Increase and Decrease

2.7 – Percent of Increase and Decrease

Learn to find percent increase and decrease.

1. Find 30% of Find 28% of 60. Solve for x = x(50)

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

find the percent increase and decrease of a number.

Percent Math 6.

Bell Work From 5 to = 5 40% increase

Percent of Change Vocabulary percent of change percent of increase

EXAMPLE 1 Finding a Sale Price

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

Percent of Change Vocabulary percent of change percent of increase

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

Math 5-7: Percent of Change

2-7 Notes for Algebra 1 Percent of Change.

Percent Math 6.

Percent Increase & Decrease

Discounts, Coupons and Sales

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Learn to solve problems involving percent of change.

Objective: Students will be able to solve problems involving discounts and sales tax. VOCABULARY: A discount is the difference between the original price.

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

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Percent Increase and Decrease

Percent Change: Percent Increase / Percent Decrease

Presentation transcript:

8.4 Percent of Increase and Decrease

Percent change is the ratio of the amount of change to the original amount. Percent increase describes how much the original amount increases. Percent decrease describes how much the original amount decreases.

Find the percent increase or decrease from 16 to 12. Is this percent an increase or decrease? 16 – 12 = 4 First find the amount of change. Think: What percent is 4 of 16? amount of decrease original amount 4 16 Set up the ratio.

Reduce the fraction or find the decimal form. 4 16 1 4 Continued Reduce the fraction or find the decimal form. 4 16 1 4 = = 25% Write as a percent. From 16 to 12 is a 25% decrease.

Is this percent an increase or decrease? Try This: Find the percent of increase or decrease from 15 to 20. Is this percent an increase or decrease? 20 – 15 = 5 First find the amount of change. Think: What percent is 5 of 15? amount of increase original amount 5 15 Set up the ratio.

= 0.33… Find the decimal form. Continued Reduce the fraction if possible. 5 15 = 0.33… Find the decimal form. 1 3 = 33 1 % Write as a percent. 3 1 From 15 to 20 is a 33 % increase. 3

Percent Decrease Sarah bought a DVD player originally priced at $450 that was on sale for 20% off. What was the sale price? $450  20% First find 20% of $450. $450  0.20 = $90 20% = 0.20 The amount of decrease is $90. Think: The reduced price is $90 less than $450. $450 – $90 = $360 Subtract the amount of decrease. The sale price of the DVD player was $360.

Percent Increase Mr. Olsen has a computer business in which he sells everything at 40% above the wholesale price. If he purchased a printer for $85 wholesale, what will be the retail price? $85  40% First find 40% of $85. $85  0.40 = $34 40% = 0.40 The amount of increase is $34. Think: The retail price is $34 more than $85. $85 + $34 = $119 Add the amount of increase. The retail price of this printer will be $119.