Lesson 3.2: Connect Percent and Proportion

Presentation

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Mathematics

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7th Grade

•

Practice Problem

•

Hard

•

CCSS

6.RP.A.3C

Standards-aligned

Reed Carbone

Used 61+ times

FREE Resource

7 Slides • 4 Questions

Lesson 3.2

Connect Percent and Proportion

Definition:

Key Concept:

In this section we will learn how to write a percent proportion. We will then use this to be able to find percentages of numbers or find what percent a ratio is. We can use a percent equation to find either the percent, the part or the whole.

Solve the problems using percent proportions:

1. 2% of 180

What percent is 17 out of 40?

Multiple Choice

Write a percent proportion for 4% of 500

$\frac{4}{500}=\ \frac{x}{100}$

$\frac{x}{4}=\frac{100}{500}$

$\frac{4}{100}=\frac{x}{500}$

$\frac{4}{100}=\frac{500}{x}$

Multiple Choice

Find 4% of 500

2,000

200

125

Example: The rabbit population on a farm is 200% the population of last year. If there are now 1,100 rabbits this year, how many were there last year?

Example: You bought a house for $240,000 with a down
payment of $60,000:

●Their down payment is what percentage of the purchase price?

●What percent of the purchase would a $12,000 down payment be?

Multiple Choice

What percent of $40,000 is $500?

1.25%

80%

8000%

0.0125%

Multiple Choice

What percent of 400 is 20?

50%

20%

Conclusion: Write two complete sentences about what you learned.

Lesson 3.2

Connect Percent and Proportion

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