Least Common Denominator (LCD) of 61, 79, and 90
The Least Common Denominator of 61, 79 and 90, also known as the Lowest Common Denominator of 61, 79 and 90, is useful if you need to add, subtract, or compare three fractions with the denominators of 61, 79 and 90.
The fractions with 61, 79 and 90 denominators will look like this:
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The Least Common Denominator of 61, 79 and 90 is 433710.
You need to multiply 61 by 7110, 79 by 5490, and 90 by 4819 to make them all 433710. Furthermore, you need to multiply the numerators by the same amounts to keep the fraction values the same.
Therefore, you have to make the following calculations so the fractions keep the same value and get the same denominator:
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Which gives you the following three new fractions that you can add, subtract and compare:
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You can substitute X, Y and Z with the numerators of your fractions with 61, 79 and 90 denominators. This way you can add, subtract and compare your fractions correctly.
Least Common Denominator Calculator
Please enter another two or three denominators below so we can calculate the Least Common Denominator (LCD) for you:
Least Common Denominator (LCD) of 61, 79 and 91
Here is the next set of numbers we have calculated the LCD for.
Notes
The Least Common Denominator of 61, 79 and 90 is the same as the Least Common Multiple of 61, 79 and 90.
To calculate what to multiply each denominator and corresponding numerator by, we divided the LCD by each of the denominators.