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You can find a missing denominator if you know something that the fraction is equal to. Then you can find the missing denominator through cross multiplication.

Q: How do you find a missing denominator?

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The answer depends on what other information you have.

The answer depends on what other information you have.

That really depends on what information is given.

U sex

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The answer depends on what other information you have.

The answer depends on what other information you have.

That really depends on what information is given.

For A/B = C/D, B = AD/C

U sex

An equivalent fraction is just a multiple of the one that you have (i.e it is the one that you have, scaled up or down). So multiply the fraction that you have until either the numerator or the denominator match the given numerator/denominator of the fraction with the missing number. The number in the corresponding place on the fraction that you multiplied is the missing number.

The answer depends on the part of the question that is missing.

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you find the common denominator

Missing....? But the answer to find the missing is normally either "algebra" or "find another equation to use."

You divide the numerator by the denominator.

The denominator is the fractional part is missing.