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Example: 1/30 and 1/42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Select the highest amount of each factor.
2 x 3 x 5 x 7 = 210, the LCD
Wiki User
∙ 7y ago
Wiki User
∙ 11y agoThe first step is to find the prime factors of the numbers.
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What is the first step to finding the lowest common denominator of two fractions?
The first step in finding the lowest common denominator of two fractions is to multiply the two denominators. Then you see if there are any smaller numbers that are divisible by both denominators.
How do you find least common denominator?
You can compare fractions that do not have the same numerator or denominator by finding the least common denominator. For example, compare 1/6 and 1/4. Step 1: Find multiples of the denominators, 6 and 4. Step 2: Find the LCM of 6 and 4. Look at the multiples of 6 and 4. 12 is the least number that is a common multiple of both 6 and 4. Step 3: Write equivalent fractions of 1 out of 6 and 1 out of 4 using 12 as the LCD. Step 4: Compare the 2 fractions.
What is the step to finding the least common denominator?
There are many ways to find the lowest common denominator (LCD). One way is to list out all the factors of both numbers and find the common one. Whichever one is the lowest is the LCD. But if you're using larger numbers you can do trial and error or multiple the denominators.
How do you subtract unlike denominators?
Change them so they have like denominators. Multiply all that fractions by the least common denominator so that they'll have the same denominators. Example: 1/2 - 1/3 Step 1: The least common denominator is 6. Step 2: Change each fraction so their denominator is 6 (You'll get 3/6 and 2/6) Step 3: Subtract them: 3/6 - 2/6 = 1/6
How do we add dissimilar fraction?
The first step it to find a common multiple to the denominators. The least common denominator is preferable because it is small but it is not necessary to find the least one. Next, convert each fraction into an equivalent factor with the common multiple as its denominator. Add together all the numerators and place this over the common denominator. Finally, simplify the answer, if possible.For example1/4 + 1/5 + 1/6Find a common multiple: 4*5*6 = 120 (which is also the LCM).Find equivalent fractions: 1/4 = 30/120, 1/5 = 24/120 and 1/6 = 20/120So 1/4 + 1/5 + 1/6 = (30 + 24 + 20)/120 = 74/120Simplify to 37/60.
What is the first step to finding the lowest common denominator of two fractions?
The first step in finding the lowest common denominator of two fractions is to multiply the two denominators. Then you see if there are any smaller numbers that are divisible by both denominators.
How do you find least common denominator?
You can compare fractions that do not have the same numerator or denominator by finding the least common denominator. For example, compare 1/6 and 1/4. Step 1: Find multiples of the denominators, 6 and 4. Step 2: Find the LCM of 6 and 4. Look at the multiples of 6 and 4. 12 is the least number that is a common multiple of both 6 and 4. Step 3: Write equivalent fractions of 1 out of 6 and 1 out of 4 using 12 as the LCD. Step 4: Compare the 2 fractions.
When adding or subtracting two fractions with denominators that are not equal what is the first step you take?
The first step to take is find the lowest common denominator of the fractions which can be done by finding the lowest common multiple of the numbers.
What is the step to finding the least common denominator?
There are many ways to find the lowest common denominator (LCD). One way is to list out all the factors of both numbers and find the common one. Whichever one is the lowest is the LCD. But if you're using larger numbers you can do trial and error or multiple the denominators.
What extra step will you have to perform if you use do not use the least common denominator when adding fractions?
You'll not be able to...
What extra step will you have to perform if you do not use the least common denominator when adding fractions?
To add fractions, you have to find their common denominator by multiplying the two denominators together and one of the numerators to the others. Then you add just the top numbers together.
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).
What is the least common denominator of 14 and 24?
Badly worded question, whole numbers have a denominator of 1. However, for the sake of thoroughness, I will answer the question as I interpret it. Step 1. Look for a common divisor. 2. 14 / 2 = 7. 24 / 2 = 12. Step 2. Find the common denominator. 7 x 12 = 84. Step 3. Divide by the numerator, or try to lower this fraction to lowest terms. ERROR. No numerator was provided. 84 is as far as you can go.
What are the step in adding disimilar fraction?
The first step is to find the lowest common denominator of the fractions.
How do you add or subtract dissimilar fractions?
You first convert them to similar fractions, i.e., to fractions that have the same denominator.* Step one: find a common denominator.* Step two: convert both fractions to equivalent fractions that have that denominator.
Why does the fraction that results from adding or subtracting fractions with unlike denominators have a different denominator?
When you add fractions that have unlike denominators, the first step is to convert them so they are expressed as fractions using the least common denominator. The result is that the answer will have a different denominator, or it may use one of the original two denominators.For example if you are adding 1/10 and 3/5, the least common denominator is 10, the problem is rewritten as 1/10 + 6/10 = 7/10But if you are adding 1/5 and 1/6, the least common denominator is 30 and the problem is rewritten as 6/30 + 5/30 = 11/30
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.
