Section 3.9 Percents Mr. Beltz & Mr. Sparks. Ratio A PERCENT is a ratio that compares a number to 100. You can write a percent as a FRACTION, DECIMAL,

Slides:

Advertisements

Similar presentations

SOLVING PROBLEMS INVOLVING DISCOUNTS AT SALES AND SALES TAX.

Advertisements

Which states have a sales tax rate closest to the Texas sales tax rate?

9-1: Relating Fractions, Decimals, and Percents

Adding and Subtracting Rational Expressions Section 7.2 MATH Mr. Keltner.

Two Step Equation Percentages Adding and Subtracting Adding -- Tax, Markup –Original amount + a percent of that amount –An item is marked up 75%

Percents, Discounts and Interest PERCENTS: A percent is a representation of a number, compared to a total value of 100. A percent which is less than a.

Ratios * Of means to multiply Using percents  To calculate sales tax of an item, simply multiply the cost of the item by the tax rate.  Example: You.

HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Introductory.

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

Fractions, Decimals, & Percent Conversions

DISCOUNTS, SALES TAX, TIPS DISCOUNTS Example: Regular Price = $10 Discount = 20% Step 1 Change the percentage to a decimal Step 2 Multiply the Regular.

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

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

Calculations with Percents

Interest, discounts, and sales

Bell Work: Tax and Tip! Your bill is $ What is your total after you leave a 20% tip and pay 5% tax? Method 2 Multiply the price by 125% since.

MATH WORD PROBLEM/SOLUTION. WORD PROBLEM ON FRIDAY I WENT TO THE NIKE FACTORY OUTLET TO BUY NEW BASKETBALL SHOES. THE REGULAR PRICE WAS THE STORE.

Transparency 7 Click the mouse button or press the Space Bar to display the answers.

9-3 6 th grade math Finding a Percent of a Number.

Using Percents to Solve Problems

Why??  Percents are all around us! Sales and discounts shopping Sales Tax Income Taxes Tips on restaurant bills Etc…  When doing problems with % remember.

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

Page 171 – Percent Problems

Pre-Algebra Bell Ringer 1. 10x – 5y = 2 Solve for y 2. m – n – 12 = p Solve for n 3. a – 4 < 3a x + 8 ≥ -22 – 7x.

9-9 6 th grade math Computing Discounts. Objective To find discount and sale price Why? To know how much you should pay for something that is on sale.

Sales Tax, Discounts, and Commissions Section 6.7.

Unit 5: Percent, Ratio, and Rate

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

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.

Mrs. Matej. Is the amount by which the ________ ________ of an item is ________ The discounted price of an item is always ______ than the regular price.

Fractions, Decimals, and Percents. Percents as Decimals To write a percent as a decimal, divide by 100 and remove the percent symbol. Example 1: 63% 63.

Practicing With Percents By Johnny, Sally, Mary & Joey Period 3.

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.

Bell Ringer 11-7 ( Do in notebook) 5 minutes 1. Express 20% as a fraction in lowest terms and as a decimal Express 134% as a decimal. Express 6.5%

Percents, Fractions, and Decimals Finding a Percent of a Number Lessons 6.6 & 6.7.

Sales Tax and Discount Lesson 8 – 8. Vocabulary Sales Tax – an additional amount of money charged to a purchase. Discount – the amount by which the regular.

Percents A percent is a ratio that compares a number to 100.

APPLICATIONS OF PERCENT Chapter 6. Fractions, Decimals, & Percents A percent is a ratio that compares a number to 100 To change a decimal to a percent,

Topic 2 Proportional Reasoning with Percents Percent of a Number To find the percent of a number, you can: write the percent as a fraction and.

Bellwork Write each rational number as a fraction in simplest form.

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.

Converting Fractions, Decimals & Percentages. COMMONLY OCCURING VALUES IN PERCENTAGES, DECIMALS & FRACTIONS.

Bell Work Explain why Jamar’s solution was incorrect.

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.

* Collect the like terms 1. 2a = 2a x -2x + 9 = 6x z – – 5z = 2z - 6.

+ Fractions. + Part of a whole + + Numerator How many pieces The number on the top of a fraction.

Test: Monday Have out Paper, pencil, and calculator Make sure you try the bonus When finished: work on something quietly on your own!! When finished: work.

February 25, 2016 February 25, 2016 Warm-Up: Is this a True statement? (Is each side equal to each other?) Yes Remember, when adding different signs, you.

Fraction – decimal Fraction – percent Decimal – fraction Decimal – percent Percent – decimal Percent – fraction.

Personal Finance: Taxes and Interest

Applications of Percents

Percent Math 6.

9-2 6th grade math Estimating Percent.

Percent Math 6.

Lesson 7.1 How do you write ratios and find unit rates?

Percents, Fractions, and Decimals

Percents, Fractions, and Decimals

Math in Our World Section 8.1 Percents.

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

Explaining Fractions And Decimals

Consumer Applications Review

Percents, Fractions, and Decimals

Fractions, Decimals, Percents

Calculating: Discount Prices

Fractions, Decimals, & Percents

Finding a Percent of a Number

Assignment 6.9A: 1 – 10, 18, 19.

Presentation transcript:

Section 3.9 Percents Mr. Beltz & Mr. Sparks

Ratio A PERCENT is a ratio that compares a number to 100. You can write a percent as a FRACTION, DECIMAL, or a number followed by a % sign %  This is the way we normally write percents.

Changing Decimals to Percents To change a decimal to a percent, move the decimal place two places to the RIGHT [same as multiplying by 100].4 = 40%.04 = 4%.004 =.4 % 1.2 = 120%

Changing a Fraction to a Percent To change a Fraction to a Percent: Divide the TOP by the BOTTOM Numerator = 4 Denominator 10 [Remember the TOP number goes into the Calculator 1 st ] 10/4 =.4.4 = 40%

Try these Percents

Writing Equations for Percents Objective: Write equations to solve problems involving percents.

Main Idea We can write an equation to find the percent of a number. We will change the words of a statement into math symbols. IS  EQUALS [ = ] Of  MULTIPLY [ * ]

Example IS  EQUALS [ = ] Of  MULTIPLY [ * ] What number is 20% of 750? x = 20 * 750 x =.20 * 750 x = 150

Example 2 IS  EQUALS [ = ] Of  MULTIPLY [ * ] What percent of 80 is 4? x * 80 = x =.05 5%

Practice P. 186 # 1-10, *Show your work!

Sales Tax Discount is a PERCENTAGE off of a price. [Subtract] Tax is a Percentage added to the price. [Add]

Example. Neiman Marcus has a sale. There is a 10% discount for all items purchased in the store. If you buy a coat for $100, how much do you have to pay? 10% off of a $100 coat is how much?.10 * 100 = x The discount is $10. Regular price of the coat: $100 - $10 (discount) = $90

Example. You buy a coat at Neiman Marcus for $100. There is a 6% sales tax added to the price. How much does the coat cost? $100 *.06 = $6 Original Price + Sales tax = final price $100 + $6 = $106

Practice P.186 #11,12.