 Strategies for calculating percentages with friendly numbers

# Strategies for calculating percentages with friendly numbers

I can use strategies to find percentages using friendly numbers.

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## General

In this lesson, students will learn to calculate a percentage of a whole with simple percentages, such as 1%, 10%, 20%, 25%, 50%, and 75% (with numbers up to 1000). They will conceptualize how many times a percentage fits into a whole. They will also be able to visualize how smaller percentages fit into 100% with a chart. This lesson scaffolds student learning by first providing a visual, then allowing students to solve problems without a visual, and lastly giving students word problems to solve.

## Standards

CCSS.MATH.CONTENT.6.RP.A.3.C

## Learning objective

Students will be able to apply strategies to find percentages using friendly numbers.

## Introduction

Students will drag smaller orange squares into a larger blue square and see how many orange squares will fit in the blue square. They will do this a few times with different-sized orange squares.

## Development

Students will use a chart that shows the percentages: 10%, 20%, 25%, 50%, as parts of 100%. They will learn strategies to calculate percentages of a whole, such as 50% of 40 using the chart. Next, they will solve problems without the chart. After that, they will solve word problems with percentages with friendly numbers.

## Guided practice

Review how to find percentages with friendly numbers with 10 short answer questions.

## Closing

Students will reflect on the steps to take when finding a percent of a number. Then, they will solve a few more problems: one with visual support, one without visual support, and a word problem.

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