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There is always going to be a LCM. Just multiply the two numbers together to get the a common multiple if you cant find one because the two numbers multiplied together is a common multiple.

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Yes, you have to find the Least Common Multiple.

Q: What if there is no LCM in a fraction problem?

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Since 100p3 is a multiple of 20p, it is automatically the LCM of this problem.

Since 20z is a multiple of 10z, it is automatically the LCM of this problem.

Since 616 is a multiple of 8, it is automatically the LCM of this problem.

Since 22 is a multiple of 11, it is automatically the LCM of this problem.

Since 122 is a multiple of 61, it is automatically the LCM of this problem.

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Find the GCF when you want to simplify a fraction. Find an LCM when you want to add and subtract fractions.

The first step is to find the least common multiple (LCM) of all the denominators. Next, multiply each term by this LCM. When you have done this you will have a multistep problem which is free of fractions.

There can be no LCM for a single fraction.

The LCM of 4 and 80 is 80.

91

The problem is you only have one number and you need at least two to find an LCM. If that's 4 and 8, the LCM is 8.

Since 75 is a multiple of 25, it is automatically the LCM of this problem.

Since 84 is a multiple of 28, it is automatically the LCM of this problem.

Since 540 is a multiple of 45, it is automatically the LCM of this problem.

Since 20z97 is a multiple of 4z64, it is automatically the LCM of this problem.

Since 45 is a multiple of 15, it is automatically the LCM of this problem.

The LCM refers to whole numbers, not decimals.