This math topic focuses on comparing fractions by finding the lowest common denominator. It specifically addresses cases where one of the denominators is changed to facilitate comparison. This is part of an introductory course on comparing fractions. Each question on the topic presents two fractions and multiple choice answers to identify the correct lowest common denominator. This practice helps in enhancing the understanding of concepts related to comparing fractions, in alignment with introductory fraction comparison skills.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Fraction Comparison - Find Common Denominator - Mixed - One Changed Denominator Worksheet

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Fraction Comparison - Find Common Denominator - Mixed - One Changed Denominator
1
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 7 over 2 \;\; \bigcirc \;\;31 over 4
a
11
b
2
c
4
d
13
e
9
f
3
2
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 4 over 3 \;\; \bigcirc \;\;11 over 9
a
18
b
8
c
12
d
16
e
9
f
5
3
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 31 over 3 \;\; \bigcirc \;\;19 over 6
a
6
b
7
c
9
d
11
e
3
f
5
4
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 5 over 2 \;\; \bigcirc \;\;21 over 4
a
4
b
13
c
3
d
5
e
7
f
10
5
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 21 over 2 \;\; \bigcirc \;\;9 over 4
a
5
b
3
c
10
d
1
e
4
f
9
6
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 6 over 5 \;\; \bigcirc \;\;11 over 10
a
15
b
17
c
12
d
8
e
10
f
18
7
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 3 over 2 \;\; \bigcirc \;\;11 over 4
a
5
b
4
c
6
d
1
e
8
f
11
8
What lowest common denominator would you use to compare these fractions?
A LaTex expression showing 11 over 3 \;\; \bigcirc \;\;7 over 6
a
5
b
2
c
14
d
1
e
6
f
4