Three Types of Percent Problems Day 2. 60 = 24.40 Examples: Find 40% of 60 20% of 90.20 90 = 18 Write a mathematical sentence Click.

Slides:

Advertisements

Similar presentations

Auditorium Problem 6.RP - Understand ratio concepts and use ratio reasoning to solve problems. 7.RP - Analyze proportional relationships and use them.

Advertisements

Solving Equations = 4x – 5(6x – 10) -132 = 4x – 30x = -26x = -26x 7 = x.

The Percent Proportion Percent of a number Find what percent 1 number is of another Find the base in percent problems.

Percent Equations When fractions are equal or proportional:

EXAMPLE 1 Solve absolute value inequalities

EXAMPLE 2 Using the Cross Products Property = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = Divide.

Notes Over is what percent of 140?

Percent Problems Solving Simple Percent Problems.

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.

Three Types of Percent Problems Day = Examples: Find 40% of 60 20% of = 18 Write a mathematical sentence Click.

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

New Jersey Center for Teaching and Learning

Math 10: Basic Mathematics 1 Key Topics for Chapter 6  The percentage, P%, represents the ratio "P to 100"  And so, P% = P/100 = P x.01  E.g., 17% =

It’s All About Properties of Equality. How could properties of equality be applied to solve this equation? Example 1: 3x + 11 = 32 What is the value of.

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

The Percent Proportion

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

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

Bell Ringer Change the following fractions into decimals (round if you need to): 6/8 7/9 9/10 8/3.

Lesson Topic: True and False Number Sentences Lesson Objective: I can…  Explain what the equality and inequality symbols include. They will determine.

7-7/7-8 percents of a number Indicator N7 – Solve Problems using percents.

1.4 Absolute Values Solving Absolute Value Equations By putting into one of 3 categories.

Finding a Percent of a Number

Section 5.3 Solving Systems of Equations Using the Elimination Method There are two methods to solve systems of equations: The Substitution Method The.

If a = b, then a + c = b + c or Given a = b and c = c

7th Grade Math Percents. Relating Fractions, Decimals & Percents Day 1.

Bell Ringer 2. Systems of Equations 4 A system of equations is a collection of two or more equations with a same set of unknowns A system of linear equations.

Goal 4.03: Systems of Equations and Inequalities.

The Substitution Method Objectives: To solve a system of equations by substituting for a variable.

9-6 6 th grade math Solving Percent Problems Using Equations.

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

Algebra Review. Systems of Equations Review: Substitution Linear Combination 2 Methods to Solve:

Solving Addition and Subtraction Equations An equation is a mathematical sentence that contains an equal sign.

Equations and Inequalities. Unit 8 – Solving Inequalities.

1.4 Solving Equations.

6 Chapter Chapter 2 Percent.

Finding a Percent of a Number

The Percent Proportion

The Percent Proportion

Addition and Subtraction

Multiplication and Division

Finding a Percent of a Number

Three Types of Percent Problems

The Percent Proportion

1.4 – Writing Equations and Inequalities

Finding a Percent of a Number

The Percent Proportion

< > < < Solving Inequalities < < < >.

The Percent Proportion

One-Step Equations with Addition and Subtraction

What is an equation? An equation is a mathematical statement that two expressions are equal. For example, = 7 is an equation. Note: An equation.

Finding a Percent of a Number

Finding a Percent of a Number

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

Solving Percent Problem with Equations

Title of notes: The Percent Proportion

Solving One-Step Equations

The Percent Proportion

Notes Over 1.7 Solving Inequalities

< > < < Solving Inequalities < < < >.

Every number has its place!

Notes Over 1.7 Solving Inequalities

Unit 4. Day 13..

Equations …. are mathematical sentences stating that two expressions are equivalent.

Course 2: Inequalities Objectives:

Solving Equations.

Objective: Write, Graph, and Solve Inequalities

Presentation transcript:

Three Types of Percent Problems Day 2

60 = Examples: Find 40% of 60 20% of = 18 Write a mathematical sentence Click

X = Write a mathematical sentence Try these: Find 12% of 70 What is 40% of 28?

is of % 100 = Note: You can use this box to solve many problems involving percents! Note: Try to find the numbers that are attached to the words/symbols: is, of, or percent.

Example: What is 25% of 400? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 = What is 25% of 400? ? Click on each box to see if you substituted correctly. 400 x 25 = 100w 10,000 = 100w 10,000/100 = w 100 = w Click

Example: What is 32% of 300? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 = ? Click on each box to see if you substituted correctly. 300 x 32 = 100w 9,600 = 100w 9600/100 = w 96 = w What is 32% of 300? Click

Try it: What is 20% of 180? Steps 1. Set up the proportion. 2. Substitute. 3. Solve. is of % 100 =

12Find 30% of 45

13What is 15% of 90?

14Find the greater value. A20% of 16 B10% of 90 C25% of 40 D100% of 7

15Find the greater value. A2% of 1000 B5% of 500 C10% of 300 D15% of 100

16Identify any values that are equal. AWhat is 40% of 80? B60% of 70 C25% of 128 D200% of 16

X = X = 125

Try This: 100 is 20% of what number? 100 =.20 x 100 = x.20 x = 500

1756 is 70% of what?

1812% of what number is 6?

1965% of what number is 10?

2027 is 150% of what number?

211% of what number is 12?

What percent of 80 is 24? x 80 = 24 X = X =.30 X = 30% Remember, you can solve this by: 1. Translating into an equation 2. Setting up a proportion

60 is what percent of 15? 60 = X = X 15 4 = X 400% = X

22What percent of 3 is 12?

2330 is what percent of 36?

24What percent of 18 is 180?

252 is what percent of 1?

26What percent of 25 is 20?

You have just studied three different types of percent problems. Try all 3 types: 24 is 40% of what number? 42 is what percent of 840? What is 30% of 45?

27Find the largest value. AWhat is 50% of 50? BWhat number is 45% of 60? C30 is 60% of what number? D25% of what number is 150?

28Find the greatest percentage value. AWhat percent of 30 is 18? B60 is what percent of 90? CWhat percent of 70 is 210? D1,000 is what percent of 100?

29Find 20% of 78.

308 is what percent of 28?

31What number is 3% of 17?

32Find 27% of 54.

3323 is what percent of 200?

34What percent is 35 of 20?

3556% of what number is 40?

3645 is 30% of what number?

3762% of 40 is what number? A24.8 B.0155 C24.8% D15.5