Practice
Name
9-6
Finding Common
Denominators
In 1 through 8, find a common denominator for each pair of
fractions.
3
2 and __
1. __
5
5
4
2. __
and __
1 and __
4
3. __
7
4
5
7
4. ___
and __
7 and __
1
5. ___
1 and __
2
6. __
2 and __
4
7. __
5
9
5
7 and __
8. __
4
15
3
8
2
9
3
12
8
9
6
In 9 through 16, find a common denominator for each pair of
fractions. Then rename each fraction in the pair.
3
3
and __
9. ___
12
8
7 and __
1
13. __
9
6
1 and __
2
10. __
7
8
1 and __
2
11. __
9
1 and __
1
12. __
5
3
3
1 and __
14. __
7 and __
2
15. __
3
5
16. __
and __
6
4
2
8
3
8
6
18. Andrew wants to rename _27 and
_3 using a common denominator.
4
Which of the following shows
these fractions renamed correctly?
17. Train A arrives at Central Station
on the hour and every 12 minutes.
Train B arrives on the hour and
every 15 minutes. When do both
trains arrive at the same time?
8
21
and ___
A ___
A On the hour and 30 minutes
past the hour
B On the hour and 15 minutes to
the hour
C On the hour and 27 minutes
past the hour
D On the hour only
28
28
3
2 and ___
B ___
28
28
6
4 and ___
C ___
28
28
3
2 and __
D __
7
7
11
19. Manuel says that you can use one of the denominators of _56 and __
when
30
renaming these fractions using a common denominator. Why is this true?
P 9•6
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