What is the Least Common Denominator of 9 and 70?




You need to know the least common denominator (LCD) of 9 and 70 if you want to add or subtract two fractions with 9 and 70 as denominators.

The least common denominator, also called lowest common denominator (LCD), of 9 and 70 is 630.


Here is a math problem example where you need to know the LCD of 9 and 70 to solve:

3/9 + 2/70 = ?

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

630/9 = 70
630/70 = 9

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

3 x 70 = 210
2 x 9 = 18

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

210/630 + 18/630 = 228/630
= 3/9 + 2/70 = 228/630

It's that easy! Once again, the lowest common denominator (LCD) of 9 and 70 is as follows:

630


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