Q: What is the common denominator for 5 and 20?

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20 is.

The answer is 20.

20

300

A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.

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20 is.

The answer is 20.

20

LCD(4, 5) = 20.

20

60

20

300

A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.

The common denominator of 5/20 and 2/3 is 60. Of course, 5/20 is really 1/4 so it will eventually reduce down to 12.

The bottom number of a fraction is called the denominator. In order to add and subtract fractions with different denominators, it is necessary to make them the same, or "common." Example: 1/4 + 1/5. The common denominator is 20. 1/4 = 5/20 1/5 = 4/20 1/4 + 1/5 = 5/20 + 4/20 = 9/20

First of all you need to line them up. 8/20 - 2/5 Next you need to find a common denominator. 20 is a common denominator between the 2. Then you change both denominators to the common one. 8/20=8/20, 2/5 x 4/4= 8/20 {Since 5x4=20, you have to do that on both sides to get the common denominator.} Then you subtract 8/20 - 8/20 = 0. So the answer is 0