In finding the LCM or HCF of two or more numbers
The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.
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?
LCM is used to find the lowest common denominator in fractions HCF is used to reduce fractions to their simplest terms
Any job where you need to add or subtract fractions.
In finding the LCM or HCF of two or more numbers
The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.
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?
LCM is used to find the lowest common denominator in fractions HCF is used to reduce fractions to their simplest terms
For the division of quantities
Use GCF instead of HCF. 6 and 30 would be those numbers...
2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.
When we simplify fractions.
Chefs, carpenters, anyone who has to add, subtract or simplify fractions.
If you are a teacher who works with 27 pupils and 18 pupils and
Any job where you need to add or subtract fractions.
For adding and subtracting fractions with different denominators and reducing them to their lowest terms.