You need to know the least common denominator (LCD) of 5 and 55 if you want to add or subtract two fractions with 5 and 55 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 5 and 55 is 55.
Here is a math problem example where you need to know the LCD of 5 and 55 to solve:
3/5 + 2/55 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
55/5 = 11
55/55 = 1
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 11 = 33
2 x 1 = 2
Step 3) Put it all together to solve the problem:
33/55 + 2/55 = 35/55
= 3/5 + 2/55 = 35/55
It's that easy! Once again, the lowest common denominator (LCD) of 5 and 55 is as follows:
55
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.