You need to know the least common denominator (LCD) of 61 and 9 if you want to add or subtract two fractions with 61 and 9 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 61 and 9 is 549.
Here is a math problem example where you need to know the LCD of 61 and 9 to solve:
3/61 + 2/9 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
549/61 = 9
549/9 = 61
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 9 = 27
2 x 61 = 122
Step 3) Put it all together to solve the problem:
27/549 + 122/549 = 149/549
= 3/61 + 2/9 = 149/549
It's that easy! Once again, the lowest common denominator (LCD) of 61 and 9 is as follows:
549
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.