You need to know the least common denominator (LCD) of 31 and 8 if you want to add or subtract two fractions with 31 and 8 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 31 and 8 is 248.
Here is a math problem example where you need to know the LCD of 31 and 8 to solve:
3/31 + 2/8 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
248/31 = 8
248/8 = 31
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 8 = 24
2 x 31 = 62
Step 3) Put it all together to solve the problem:
24/248 + 62/248 = 86/248
= 3/31 + 2/8 = 86/248
It's that easy! Once again, the lowest common denominator (LCD) of 31 and 8 is as follows:
248
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.