What is the Least Common Denominator of 9 and 71?




You need to know the least common denominator (LCD) of 9 and 71 if you want to add or subtract two fractions with 9 and 71 as denominators.

The least common denominator, also called lowest common denominator (LCD), of 9 and 71 is 639.


Here is a math problem example where you need to know the LCD of 9 and 71 to solve:

3/9 + 2/71 = ?

Step 1) Take the LCD and divide each denominator by it as follows:

639/9 = 71
639/71 = 9

Step 2) Multiply each nominator with the respective answers from Step 1:

3 x 71 = 213
2 x 9 = 18

Step 3) Put it all together to solve the problem:

213/639 + 18/639 = 231/639
= 3/9 + 2/71 = 231/639

It's that easy! Once again, the lowest common denominator (LCD) of 9 and 71 is as follows:

639


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