Find the LCD 7/10 , 17/20 , 13/40

Math
710 , 1720 , 1340
To find the LCD of a set of numbers (710,1720,1340), find the LCM of the denominators.
LCM(10,20,40)
Calculate the LCM of first two denominators in the list, 10 and 20.
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Find the values of the numerical part of each term. Select the largest one, which in this case is 20. Multiply them together to get the current total. In this case, the current total is 200.
Current Total = 200
Check each value in the numerical part of each term against the current total. Since the current total is evenly divisible, return it. That is the least common denominator of the numerical part of the fraction.
20
20
Calculate the LCM of the previously calculated LCM, 20, and the next denominator in the list, 40. Since this is the last denominator in the list, the result is the LCD.
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Find the values of the numerical part of each term. Select the largest one, which in this case is 40. Multiply them together to get the current total. In this case, the current total is 800.
Current Total = 800
Check each value in the numerical part of each term against the current total. Since the current total is evenly divisible, return it. That is the least common denominator of the numerical part of the fraction.
40
40
Find the LCD 7/10 , 17/20 , 13/40

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