Finding a Percent of a Number

Slides:

Advertisements

Similar presentations

7-8 Solving Percents Problems Learn to solve problems involving percents.

Advertisements

7-8 Solving Percents Problems I CAN use a proportion to solve problems involving percents. I CAN use an equation to solve problems involving percents.

Notes Over is what percent of 140?

Using Cross Products Lesson 6-4. Cross Products When you have a proportion (two equal ratios), then you have equivalent cross products. Find the cross.

1 Percent Proportion. 2 Percent Means ‘of a hundred’

Finding a Percent of a Number Lesson 6-7. Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation.

Solving Equations Containing Percents. Percent Proportion Method Part = % Whole 100 Example: What is 25% of 20? x = 25 You are trying to find a.

Solving Percent Problems Using Proportions

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.

Solving Percent Problems Section 6.5. Objectives Solve percent problems using the formula Solve percent problems using a proportion.

Solve each proportion c6c = y7y = 3 + x = 2 + x x – = –17 Math on the Mind.

Fraction to Decimal and Percent. Fraction to Decimal 2. Divide 1 2 EX 1) = 1. Make denominator a power of 10. OR X X 5 10 ?5 5 Put numerator behind decimal.

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

Proportions. Proportion – two equal ratios 1 = 4 3 = = 21 a = c 8 24 b d.

Ratio, Rate, Proportion, and Percent. Ratio  Comparison of two numbers by division  Can be written three different ways 4 to 9 4 :

Find a Percentage of a Number SWBAT use the percent formula to find a percentage of a number; use a percent proportion to find a percentage of a number.

Proportion Graphing Activity Monday, December 16, 2012.

Holt CA Course Solving Percents Problems NS1.4 Calculate given percentages of quantities and solve problems involving discounts at sales, interest.

Using Proportions Lesson 4-1. Ratio: The comparison of two numbers (written in Algebra as a fraction) Proportion: When two ratios are equal to each other.

Solving Percent Problems Using Proportions

Chapter 9: Lesson 4: Solving Percent Problems with Proportions

Chapter 10: Lesson 4: Solving Percent Problems with Proportions

PRE-ALGEBRA. Lesson 6-7 Warm-Up PRE-ALGEBRA What is “percent of change”? How do you find the percent of increase or decrease? percent of change: percent.

Lesson 7-8 Pages The Percent Proportion. What you will learn! How to solve problems using the percent proportion.

Solving Decimal Equations by x / ÷ Lesson 3-6. Basic Decimal Knowledge Decimal represented by . “Decimal places”  the digits that come AFTER the decimal.

Finding a Percent of a Number

Using Equations to Solve Percent Problems

Cross Products and Proportions

Holt CA Course Solving Percents Problems Warm Up Warm Up California Standards California Standards Lesson Presentation Lesson PresentationPreview.

Lesson 4-3 Solve proportion problems by using the percent equations

7-8 Solving Percents Problems I CAN determine the percent given the part and the whole. I CAN determine the whole given the percent and the part.

Percent Review Mrs. Leuschen Part/Whole/Percent Equations.

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

Finding a Percent of a Number

Solving Percent Problems Using Equations

Multiplying Decimals 3-6 & 3-7.

Finding a Percent of a Number

Three Types of Percent Problems

A proportion is an equation that states two ratios are equal

Example 1: Find percent using a proportion. What is 60% of 500?

Lesson 85 Warm Up Pg. 441.

Proportions and Percent Equations

Lesson 5-1: Using Proportions

2-7 Solving Proportions.

Finding a Percent of a Number

Lesson 5.2 Proportions Students will be able use cross multiply to determine if the two ratios are equivalent.

Percent Proportion TeacherTwins©2014.

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

Lesson 3.1 How do you solve one-step equations using subtraction, addition, division, and multiplication? Solve one-step equations by using inverse operations.

“What percent of Whole is Part?” “What Part is Percent of Whole?”

Converting Repeating Decimals to Fractions

The Percent Proportion

Finding the Percent of a Number

Objective: Understand what proportions are, setting the up and solving

Percent Proportion.

Finding a Percent of a Number

Solving Percent Problem with Equations (7.2) Proportions (7.3)

Percents and Equations

Percents Chapter 7 Section 7.5.

Lesson 5-1: Using Proportions

The Percent Proportion

Solving Percents Problems

Solving Percents Problems

Solving Percent Problems Using Proportions

can you distinguish between multiplication and division!

Tuesday’s Warm Up.

Lesson 6 Ratio’s and Proportions

To Start: 10 Points Solve the Proportions: 2 3

Using Cross Products Chapter 3.

Presentation transcript:

Finding a Percent of a Number Lesson 6-7

Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation. Solve the equation. To set up your proportion, think, “IS over OF equals PERCENT over 100.”

Example – What is 20% of 30? x 20 = 30 100 100x = 30(20) 100x = 600 part = 30 100 whole 100x = 30(20) 100x = 600 100 100 x 6 =

Using a Decimal Change the percent to a decimal. Multiply that decimal by the number you are finding the percent of.

Example – What is 18% of 70? 18% = 0.18 0.18 x 70 = 12.6

Homework Time