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# Percents

## Write percents as ratios and ratios as percents

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.

## Recognize and Write Percents

recognize and write percents as part of a whole out of 100
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## Recognize and Write Percent

Learn to recognize and write percent.
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## Percents

Defines percents and explores how to use them to describe real world situations such as test scores, quantities, and measurement.
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• PLIX

## Percents: Play Checkers

Percents Interactive
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• Video

## SAT Math (Number and Operations) - Practice 2.1

Overview
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• Real World Application

## Winning Percentages

Discover what it takes to win the presidential election.
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• Real World Application

## Breathing Room

Discover why more oxygen in the air is not always better for you.
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• Real World Application

## The Dirty Dozen

Find out what percent of apples tested positive for pesticides.
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