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It's kind of an inverse relationship. The product of the GCF and LCM of two numbers is the same as the product of the original two numbers, so as the GCF increases, the LCM decreases and vice versa.

LCM is divisable by HCF.

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βˆ™ 11y ago
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βˆ™ 12y ago

Most times the question will specify "find the HCF" or "find the LCM." If you're trying to find common denominators, that's an LCM problem. If you're trying to reduce fractions, that's an HCF problem.

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βˆ™ 12y ago

The LCM will help you add and subtract fractions. The GCF will help you simplify fractions.

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Q: Why you need LCM and HCF in maths?
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