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what is the best common denominator to use to compare 2/7 and 4/9?
Haider Tahir
63 is their lowest common denominator, so you should use that.
2/7 = 18/63 and 4/9 = 28/63
wthu
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How do you use comparing mixed fractions?
Assuming the fractions are "normalized" (the fractional part is less than 1): First compare the integer part. If the integer part is the same, you need to compare the fractions. If the denominator of the fractions is different, you have to convert to a common denominator. The simplest way to find a common denominator is to multiply both denominators (i.e., you don't need the LEAST common denominator - any common denominator will do).
Why is it easier to compare fractions with the same rather than denominator?
If the fractions have different denominators, you need to: 1) Convert to equivalent fractions with a common denominator, 2) Compare the numerators. If the fractions already have the same denominator, there is no need for the first step - which happens to be the most difficult step. Note that as a shortcut, you don't need the LEAST common denominator, any denominator can do. Thus, you can just use the product of the two denominators as the common denominator. As a result, to compare the fractions, you simply multiply the numerator of each fraction by the denominator of the other one, and then compare. However, this is still more work than simply comparing two numbers.
How do you order fractions with unlike denominators?
You can convert them to equivalent fractions with like denominators, then simply compare the numerators.You might also convert each fraction to a decimal (divide the numerator by the denominator); then you can also compare them.
What is larger 2 sevenths or 1 fifth?
You can find this out in any of the following ways: 1. Find a common denominator (multiplying the two denominators is one way - it need not be the LEAST common denominator). Convert the fractions to this common denominator. Then you can compare. 2. Use a calculator to convert the fractions to decimal, then compare. To convert to decimal, just divide the top part of the fraction by the bottom part.
How to add fractions having similar numerators but different denominators?
The first step, to add, subtract, or compare fractions, is always to convert the fractions to equivalent fractions, that all have the same denominator. You can use one of several techniques to get the LEAST common denominator, or simply multiply the two denominators to get a common denominator (which in this case may, or may not, be the smallest common denominator).
Which operations don't require a common denominator?
Addition and subtraction are the only fraction operations that need a common denominator. Multiplication, division, and exponents do not need a common denominator. In fact, it is best to use reduced fractions otherwise it gets very messy.
Which is bigger three eighths or two sevenths?
Convert everything to a common denominator (/56), then compare. Alternately, you can use a calculator to divide 3 by 8, and to divide 2 by 7, then you can compare the resulting decimals.
Do you have to find the lcd when comparing them or can you use any common denominator?
For the sake of comparison, any common denominator will do.
Which fraction is bigger 5 eights or 7 fifteens?
To compare fractions, do one of the following: 1. Convert to a common denominator; in this example, that may be 120. (It need not be the least common denominator; any common denominator will do, so you can just multiply both denominators.) 2. Use a calculator to convert to decimal. In this case, 5 divided by 8, and 7 divided by 15.
What is halfway between 1 over 4 and 1 over 2?
Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.
How do you use least common denominator in a sentence?
the least denominator is the bottom number of a fraction that u use the least
Is one third bigger than four fifths?
No. To compare fractions, you can convert them to a common denominator (in this case, fifteenths). You can also use a calculator to convert each fraction to a decimal.
