You need to know the least common denominator (LCD) of 7 and 69 if you want to add or subtract two fractions with 7 and 69 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 7 and 69 is 483.
Here is a math problem example where you need to know the LCD of 7 and 69 to solve:
3/7 + 2/69 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
483/7 = 69
483/69 = 7
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 69 = 207
2 x 7 = 14
Step 3) Put it all together to solve the problem:
207/483 + 14/483 = 221/483
= 3/7 + 2/69 = 221/483
It's that easy! Once again, the lowest common denominator (LCD) of 7 and 69 is as follows:
483
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.