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A common denominator is required to add or subtract fractions and not otherwise.

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Q: When is a common denominator needed and when is one not needed?
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Related questions

What is the least common denominator for 49 over 64?

At least one other fraction is needed to determine a common denominator.


Why do you have to have a common denominator?

A common denominator is needed when adding or subtracting fractions of different denominators.


What is the common denominator for 5 over 3?

At least two fractions are needed to determine a common denominator.


What is a common denominator for 5 eighths?

At least two fractions are needed in order to determine a common denominator.


Do you need a common denominator for dividing fractions?

No only when adding or subtracting fractions a common denominator is needed


What is the common denominator of 2 over 8 and 3 over 6?

The lowest common denominator needed is 24


What is the common denominator of 1198?

Two or more numbers are needed to find their lowest common denominator which is the same as their lowest common multiple.


What is the least common denominator of 180 over 168?

At least two fractions are needed to determine a least common denominator.


What is the common denominator of 8 and 10?

A common denominator, though not the least, is 80.


What is always needed when adding and subtracting fractions?

a common denominator


What is a common denominator of fractions 34 and 58?

If you mean fractions of 3/4 and 5/8 then the lowest common denominator needed is 8


What is the common denominator of one thousand and eighty four?

The common denominator refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The common denominator for a number is itself.