You need to know the least common denominator (LCD) of 1 and 86 if you want to add or subtract two fractions with 1 and 86 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 1 and 86 is 86.
Here is a math problem example where you need to know the LCD of 1 and 86 to solve:
3/1 + 2/86 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
86/1 = 86
86/86 = 1
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 86 = 258
2 x 1 = 2
Step 3) Put it all together to solve the problem:
258/86 + 2/86 = 260/86
= 3/1 + 2/86 = 260/86
It's that easy! Once again, the lowest common denominator (LCD) of 1 and 86 is as follows:
86
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.