Adding and Subtracting Fractions

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What is a fraction?

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A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

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How do you add fractions with different denominators?

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To add fractions with different denominators, find a common denominator, convert each fraction, and then add the numerators.

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What is the least common denominator (LCD)?

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The least common denominator is the smallest multiple that two or more denominators share.

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How do you subtract fractions with different denominators?

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To subtract fractions with different denominators, find a common denominator, convert each fraction, and then subtract the numerators.

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Find the least common denominator, which is 18.

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The common denominator is 56.

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What does it mean to simplify a fraction?

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To simplify a fraction means to reduce it to its lowest terms by dividing the numerator and denominator by their greatest common factor.