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# Ratio, Proportion, and Variation

## Identify variations from word problems

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
• Video

## Writing Basic Ratios - Overview

by CK-12 //basic
Overview
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• Video

## Solving Word Problems Involving Ratios and Proportions - Overview

by CK-12 //basic
Overview
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• Video

## Finding Percents by Using Proportions - Overview

by CK-12 //basic
Overview
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• Video

## Direct and Inverse Variation

by CK-12 //basic
Explains direct and inverse variation: what they mean and what the graphs look like.
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• Video

## Writing Basic Ratios - Example 1

by CK-12 //basic
Writing Basic Ratios Given Word Problems
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• Video

## Writing Basic Ratios - Example 2

by CK-12 //basic
Writing Basic Ratios Given Images
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• Video

## Solving Word Problems Involving Ratios and Proportions - Example 1

by CK-12 //basic
Finding Ratios Given Word Problems
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• Video

## Solving Word Problems Involving Ratios and Proportions - Example 2

by CK-12 //basic
Writing and Solving Proportions Given Word Problems
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• Video

## Finding Percents by Using Proportions - Example 1

by CK-12 //basic
Finding the Percent by Using Proportions Given Two Numbers
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• Video

## Finding Percents by Using Proportions - Example 2

by CK-12 //basic
Finding the Number by Using Proportions Given One Number and the Percent
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• Real World Application

## How Balloons Destroyed the Economy

by CK-12 //basic
Learn how balloon mortgages caused an economic crisis.
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