You need to know the least common denominator (LCD) of 99 and 9 if you want to add or subtract two fractions with 99 and 9 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 99 and 9 is 99.
Here is a math problem example where you need to know the LCD of 99 and 9 to solve:
3/99 + 2/9 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
99/99 = 1
99/9 = 11
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 11 = 22
Step 3) Put it all together to solve the problem:
3/99 + 22/99 = 25/99
= 3/99 + 2/9 = 25/99
It's that easy! Once again, the lowest common denominator (LCD) of 99 and 9 is as follows:
99
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.