You need to know the least common denominator (LCD) of 39 and 6 if you want to add or subtract two fractions with 39 and 6 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 39 and 6 is 78.
Here is a math problem example where you need to know the LCD of 39 and 6 to solve:
3/39 + 2/6 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
78/39 = 2
78/6 = 13
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 2 = 6
2 x 13 = 26
Step 3) Put it all together to solve the problem:
6/78 + 26/78 = 32/78
= 3/39 + 2/6 = 32/78
It's that easy! Once again, the lowest common denominator (LCD) of 39 and 6 is as follows:
78
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.