Subtracting Fractions with unlike denominators

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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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What does it mean to subtract fractions?

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Subtracting fractions means finding the difference between two fractions.

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What are unlike denominators?

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Unlike denominators are denominators that are not the same in two or more fractions.

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How do you subtract fractions with unlike denominators?

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1. Find a common denominator. 2. Convert each fraction to an equivalent fraction with the common denominator. 3. Subtract the numerators and keep the common denominator.

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The first step is to find a common denominator, which in this case is 20.

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The common denominator is 12.

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What is the greatest common divisor (GCD)?

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The GCD is the largest number that divides two or more numbers without leaving a remainder.