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The lowest common denominator is simply the lowest real number that two separate denominators can be converted to. Fractions are easier to add, subtract, and compare when they are in terms of the same denominator.

For example, we will use the numbers 1/3 and 1/4. First find the lowest common multiples (LCM).

3:3,6,9,12

4:4,8,12

Now that you have found the lowest common multiple, you find an equivalent fraction that has the same value.

1/3 * 4/4 = 4/12

1/4 * 3/3 = 3/12

When you multiply the denominator by a number, you have to do the same for the numerator. This is called the Property of One. Now you add the two fractions together.

4/12 + 3/12 = 7/12

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4y ago

4/6 -1/3

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Q: How do you find the lowest common denominator in fractions?
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Related questions

How can you find a common denominator for two unlike fractions?

Find the lowest common multiple of the denominators and adjust the fractions accordingly


When adding 2 fractions 1 step is to find the lowest common what?

Denominator


When adding or subtracting two fractions with denominators that are not equal what is the first step you take?

When adding or subtracting fractions with different denominators, the first step is to find a common denominator. This involves finding the least common multiple (LCM) of the two denominators. Once you have a common denominator, you can then add or subtract the numerators of the fractions accordingly.


How do subtract two fractions with different denominator?

First find the lowest common denominator and then adjust the fractions accordingly before subtracting the numerators


How do you find the sum or difference of two fractions with different denominators?

find the lowest common denominator


What common denominator would you use to add fractions?

There isn't a universal answer to all problems. What you should try to do is find the lowest common denominator between the fractions you are adding.


Adding unlike fractions?

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.


Are prime factors the easiest way to reduce fractions and find whether a fraction is in its simplest form and to find the lowest common denominator of two or more denominators?

Yes that is the most effective approach in reducing fractions and finding their lowest common denominator.


What must a mathematician do before adding two unlike fractions?

Find the lowest common denominator


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Find the lowest common denominator, convert them, and arrange them in ascending order.


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The first step is to find the lowest common denominator of the fractions.


What is the least common denominator for the fractions 5656 and 3838?

There doesn't appear to be any fractions there but to find the LCD of fractions is done in the same way as finding the lowest common multiple of numbers.