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The GCF helps you to reduce fractions and the LCM helps you to add and subtract fractions. I don't know what profession you're going to pursue later in life, and you may not either. Cooks deal with fractions, auto mechanics do, Accountants do. You can swear to me that you will never have anything to do with fractions once you're out of school, but the study of mathematics is designed so that you will become proficient at manipulating numbers, so if you're going to be wealthy enough to have someone else manage your money, you'll be all right. You may need to know something about numbers while you're accumulating all that wealth. Better to learn it and not need it than to need it and not have learned it.

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Q: How do you use HCF and LCM in daily life?

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If you are a teacher who works with 27 pupils and 18 pupils and

LCM is used to find the lowest common denominator in fractions HCF is used to reduce fractions to their simplest terms

to measure the tiles for our floor, if you need larger tiles so you could find by HCF and if smaller tiles you could find that by LCM

The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.

In finding the LCM or HCF of two or more numbers

You would use it when adding fractions.

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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.

2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.

Use GCF instead of HCF. 6 and 30 would be those numbers...

You use the LCM when you want to add or subtract fraction and then you can use the HCF to simplify the result. You may want to do this when budgeting: for example one quarter of your pay goes on rent, two fifths goes on food and drink, and so on. So how much of your pay is available for discretionary spending?

Any job where you need to add or subtract fractions.

Chefs, carpenters, anyone who has to add, subtract or simplify fractions.

you are doing it right now. Unless you are dead, then that means I'm discussing this with a zombie.

When we simplify fractions.

For adding and subtracting fractions with different denominators and reducing them to their lowest terms.

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Steps to find out LCM of two numbers(a & b):1- Find HCF of a & b.2- Multiply a and b.3- Divide the result of step 2 by HCF. The result is LCM.1- In order to find out HCF of 540 and 315 we shall use the method of prime factorization.Prime factorization of 540 = 2x2x3x3x3x5Prime factorization of 315 = 3x3x5x7HCF(540, 315) = 3x3x5 = 45.2- Product of 540 and 315.540 x 315 = 170100.3- LCM(540, 315) = 170100/45 = 3780.

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No, I don't own one so I can't use one in my daily life.

Steps to find out LCM of two numbers(a & b):1- Find HCF of a & b.2- Multiply a and b.3- Divide the result of step 2 by HCF. The result is LCM.1- In order to find out HCF of 540 and 315 we shall use the method of prime factorization.http://wiki.answers.com/What_is_the_LCM_of_540_and_315#ixzz1N04Gck00Prime factorization of 21 = 3x7Prime factorization of 80 = 2x2x2x2x5So, HCF(80, 21) = 12- Product of 80 and 21.80 x 21 = 16803- LCM(80, 21) = 1680/1 = 1680