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When the numerator is less than the denominator then it is a common fraction but if the numerator is greater than the denominator then it is an improper fraction.

Q: What are common fractions?

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The least common denominator is the least common multiple of the denominators of the fractions.

you have to compare the common fractions

Multiplying the denominators together of two or more unlike fractions will get you a common multiple.

Finding the lowest common denominator

The LCD for fractions is the LCM (least common multiple) of all of the denominators.

Related questions

The least common denominator is the least common multiple of the denominators of the fractions.

You don't need a common denominator to divide fractions.

There are common fractions, improper fractions and equivalent fractions

To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.To compare two fractions, convert them to a common denominator.

Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.

Dissimilar fractions.

you have to compare the common fractions

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.

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

You DO need a common denominator to add, subtract, or compare fractions. You DO NOT need a common denominator to multiply or divide fractions.

To compare fractions, convert both of them to a common denominator.