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

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LCM is applied to two or more fraction denominators. For 'A fraction' the denominator is the LCM.

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 LCM is essentially the same thing as the lowest common denominator. To find the LCD, find the LCM of the denominators.

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 216 is a multiple of 36, it is automatically the LCM of this problem.

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

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

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

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