Find Common Denominators in Fractions

What is the least common denominator of 1/7 and 3/6?

• 14
• 21
• 7
• 42

What is the least common denominator of 6/8 and 4/12?

• 12
• 24
• 8
• 16

What is the least common denominator of 2/6 and 7/8?

• 36
• 8
• 18
• 24

What is the least common denominator of 1/4 and 1/3?

• 4
• 3
• 12
• 8

What is the least common denominator of 1/4 and 2/5?

• 5
• 25
• 10
• 20

Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8

• 32
• 12
• 8
• 24

The number on the top of a fraction is called what?

• numerator
• denominator

The number on the bottom of a fraction is called what?

• numerator
• denominator

Complete the equivalent fraction.

• 6
• 9
• 15
• 23

Magara entered the fractions 1/4 and 7/ __ into a computer program. The computer used the least common denominator to rename the fractions as 5/20 and 14/20 . What is the unknown denominator?

• 20

• 12

• 8

• 10