You need to know the least common denominator (LCD) of 23 and 9 if you want to add or subtract two fractions with 23 and 9 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 23 and 9 is 207.
Here is a math problem example where you need to know the LCD of 23 and 9 to solve:
3/23 + 2/9 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
207/23 = 9
207/9 = 23
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 9 = 27
2 x 23 = 46
Step 3) Put it all together to solve the problem:
27/207 + 46/207 = 73/207
= 3/23 + 2/9 = 73/207
It's that easy! Once again, the lowest common denominator (LCD) of 23 and 9 is as follows:
207
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.