You need to know the least common denominator (LCD) of 64 and 7 if you want to add or subtract two fractions with 64 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 64 and 7 is 448.
Here is a math problem example where you need to know the LCD of 64 and 7 to solve:
3/64 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
448/64 = 7
448/7 = 64
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 7 = 21
2 x 64 = 128
Step 3) Put it all together to solve the problem:
21/448 + 128/448 = 149/448
= 3/64 + 2/7 = 149/448
It's that easy! Once again, the lowest common denominator (LCD) of 64 and 7 is as follows:
448
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.