You need to know the least common denominator (LCD) of 82 and 39 if you want to add or subtract two fractions with 82 and 39 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 82 and 39 is 3198.
Here is a math problem example where you need to know the LCD of 82 and 39 to solve:
3/82 + 2/39 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
3198/82 = 39
3198/39 = 82
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 39 = 117
2 x 82 = 164
Step 3) Put it all together to solve the problem:
117/3198 + 164/3198 = 281/3198
= 3/82 + 2/39 = 281/3198
It's that easy! Once again, the lowest common denominator (LCD) of 82 and 39 is as follows:
3198
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.