Learn on PengienVision, Mathematics, Grade 6Chapter 6: Understand and Use Percent

Lesson 6: 6-6 Find the Whole Given a Part and the Percent

In this Grade 6 lesson from enVision Mathematics Chapter 6, students learn how to find the whole amount in a percent problem when given a part and its corresponding percent. Using double number line diagrams and algebraic equations, they practice solving problems where the percent may be less than, greater than, or equal to 100, such as determining total possible test points or original quantities. This lesson addresses Common Core standard 6.RP.A.3c on applying ratio and rate reasoning to percent problems.

Section 1

Finding the whole when given a part and percent

Property

When given a part and its corresponding percent, use the percent proportion partwhole=percent100\frac{\text{part}}{\text{whole}} = \frac{\text{percent}}{100} and solve for the whole by rearranging to whole=part100percent\text{whole} = \frac{\text{part} \cdot 100}{\text{percent}}.

Examples

Section 2

Understanding Percent Changes Greater Than 100%

Property

When a percent is greater than 100%, the part is greater than the whole.
The equation percent * whole = part is still used, but the percent is converted to a decimal greater than 1.
This means the whole (ww) is found by dividing the part (aa) by the percent as a decimal (pp):

w=apw = \frac{a}{p}

Examples

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 6: Understand and Use Percent

  1. Lesson 1

    Lesson 1: 6-1 Understand Percent

  2. Lesson 2

    Lesson 2: 6-2 Relate Fractions, Decimals, and Percents

  3. Lesson 3

    Lesson 3: 6-3 Represent Percents Greater Than 100 or Less Than 1

  4. Lesson 4

    Lesson 4: 6-4 Estimate to Find Percent

  5. Lesson 5

    Lesson 5: 6-5 Find the Percent of a Number

  6. Lesson 6Current

    Lesson 6: 6-6 Find the Whole Given a Part and the Percent

Lesson overview

Expand to review the lesson summary and core properties.

Expand

Section 1

Finding the whole when given a part and percent

Property

When given a part and its corresponding percent, use the percent proportion partwhole=percent100\frac{\text{part}}{\text{whole}} = \frac{\text{percent}}{100} and solve for the whole by rearranging to whole=part100percent\text{whole} = \frac{\text{part} \cdot 100}{\text{percent}}.

Examples

Section 2

Understanding Percent Changes Greater Than 100%

Property

When a percent is greater than 100%, the part is greater than the whole.
The equation percent * whole = part is still used, but the percent is converted to a decimal greater than 1.
This means the whole (ww) is found by dividing the part (aa) by the percent as a decimal (pp):

w=apw = \frac{a}{p}

Examples

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 6: Understand and Use Percent

  1. Lesson 1

    Lesson 1: 6-1 Understand Percent

  2. Lesson 2

    Lesson 2: 6-2 Relate Fractions, Decimals, and Percents

  3. Lesson 3

    Lesson 3: 6-3 Represent Percents Greater Than 100 or Less Than 1

  4. Lesson 4

    Lesson 4: 6-4 Estimate to Find Percent

  5. Lesson 5

    Lesson 5: 6-5 Find the Percent of a Number

  6. Lesson 6Current

    Lesson 6: 6-6 Find the Whole Given a Part and the Percent