# How to Convert a Ratio to a Percentage?

A ratio expresses a relation between two quantities. For instance, if there are 20 boys and 30 girls in a class, then the ratio of boys to girls in the class is 2:3. As ratio is a relational value,...
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http://www.ehow.com/how_8506920_convert-ratio-percentage.html

## How to Write Each Percentage as a Ratio in the Simplest Form?

A percentage is a number often followed by a percent sign (%). It represents a certain amount of something as taken out of 100 percent. For example, if five out of 25 people have blond hair, 20 per...
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http://www.ehow.com/how_8508431_write-percentage-ratio-simplest-form.html

## How to Convert Gear Ratio to MPH?

If you know the gear ratio, tire diameter, and RPMs of your car at a given speed, you can easy calculate the exact miles per hour the car is traveling using a simple formula. This formula can be us...
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http://www.ehow.com/how_6186285_convert-gear-ratio-mph.html

## How to Convert a Fraction to a Ratio?

Fractions consist of sets of numbers in which the top number (numerator) illustrates a part that is related to the whole unit, which is represented by the bottom number (denominator). A ratio is ve...
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http://www.ehow.com/how_8430467_convert-fraction-ratio.html

## How to Convert Rpm & Speed to Gear Ratio?

Engine speed measures how quickly the gears rotate, in revolutions per minute. Speed, however, measures how fast the car travels, in miles per hour. Gear ratio relates the two, but to calculate gea...
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http://www.ehow.com/how_6239507_convert-rpm-speed-gear-ratio.html