You need to know the least common denominator (LCD) of 63 and 7 if you want to add or subtract two fractions with 63 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 63 and 7 is 63.
Here is a math problem example where you need to know the LCD of 63 and 7 to solve:
3/63 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
63/63 = 1
63/7 = 9
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 9 = 18
Step 3) Put it all together to solve the problem:
3/63 + 18/63 = 21/63
= 3/63 + 2/7 = 21/63
It's that easy! Once again, the lowest common denominator (LCD) of 63 and 7 is as follows:
63
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.