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Sometimes fractions have different denominators. These are called unlike fractions. When adding or subtracting fractions with unlike denominators, it is necessary to find a common denominator to get the correct answer. This is the same process as finding the least common multiple.
Example 1/30 + 1/42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Combine the factors, eliminating duplicates.
2 x 3 x 5 x 7 = 210, the lowest common denominator.
That the denominators of fractions are the same. Needed to add and subtract fractions.
2/4 + 3/4 = 5/4
1/2 + 3/4 = 5/4 also, but you need to change the denominator of 1/2 by this form of 1 to add these fractions
2*1/2*2 + 3/4
2/4 + 3/4 = 5/4
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What is the common denominator of 4 and 8?
if you mean common factor then it is 4
What is the common denominator of 56 and 7?
A common denominator is 7.A common denominator is 7.A common denominator is 7.A common denominator is 7.
What is the Least Common Denominator of 10 and 25?
If you mean Least Common Multiple; it is 50.
What is the greatest common denominator of 24 and 36?
There can be no greatest common denominator. For supose x is the greatest common denominator. ie 24 divides x and 36 divides x. Then 2x is a common denominator and 2x > x so 2x is a greater common denominator than the greatest common denominator. That contradiction implies that there is no greatest common denominator.
What is the least common denominator of 42 and 58?
The least common denominator is 1. The greatest common denominator is 2. The least common multiple is 1,218.
