You need to know the least common denominator (LCD) of 49 and 9 if you want to add or subtract two fractions with 49 and 9 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 49 and 9 is 441.
Here is a math problem example where you need to know the LCD of 49 and 9 to solve:
3/49 + 2/9 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
441/49 = 9
441/9 = 49
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 9 = 27
2 x 49 = 98
Step 3) Put it all together to solve the problem:
27/441 + 98/441 = 125/441
= 3/49 + 2/9 = 125/441
It's that easy! Once again, the lowest common denominator (LCD) of 49 and 9 is as follows:
441
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.