When two or more fractions have the same denominator, we say that these fractions have a common

denominator.

If fractions have a common denominator, it means that their denominators are the

.

The fractions 4 , 21 , and 6 all have the same denominator.

7

7

7

Their common denominator is

.

Which of the following fractions have a common denominator?

4

3

3

2

3

1

1

3

6

7

3

4

2

3

49

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