Fractions with variables obey the same rules as fractions with numbers.
Simplifying
Algebraic fractions can be simplified, like number fractions, by dividing or cancelling.
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Example
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Adding and subtracting
If the denominators are the same, add or subtract the numerators.
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Example
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If the denominators are different, a common denominator must be found.
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Example
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Multiplying
When multiplying fractions, cancel first, if possible, then multiply top line and then bottom lines.
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Example
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Dividing
When dividing fractions, turn the second fraction upside down and change to multiplying.
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Example
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