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How can you determine the LCM of two large numbers such as 36 and 225? With the help of those numbers’ prime factors. When you determine the product of the prime factors of 36 as 22 x 32 and the product of the prime factors of 225 as 32 x 52, you can determine the…
Rate is the comparison of 2 quantities of different kind. If we buy chicken fillets, as an example, at a rate of R54/kg, it means that we have to pay R54 for 1 kg of chicken fillets. Now, if we want to buy 2,5 kg of chicken fillets, the price will be 2,5 times R54….
When increasing quantities in a given ratio, such as increasing R16 in the ratio 5:4, we use the method of dividing the given quantity by the smaller value in the ratio, in this case the 4, and then multiplying with the bigger value in the ratio, in this case the 5. Thus, when R16 is…
Ratio and rate are very similar where ratio is the comparison of two or more quantities of the same kind and rate is the comparison of two quantities of different kinds. An example of rate is R49/100g (R49 per 100 grams). What should we do if we have to share something in a given ratio?…
When multiplying or dividing fractions, we do NOT change the denominators to be common as in the case when adding or subtracting fractions. Multiplication and division of fractions are quite straightforward to do. When multiplying fractions, you can follow two methods. The first method is that you multiply all the numerators with each other and…
When you eat two-thirds of a pizza and your friend eats three-quarters (three-fourths) of the same size pizza, what is the total pizza you two have eaten? To calculate that, we need to first determine the LCD (lowest common denominator) of the thirds and the fourths. The LCD of that is 12. Thus, use equivalent…
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