You need to know the least common denominator (LCD) of 2 and 89 if you want to add or subtract two fractions with 2 and 89 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 2 and 89 is 178.
Here is a math problem example where you need to know the LCD of 2 and 89 to solve:
3/2 + 2/89 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
178/2 = 89
178/89 = 2
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 89 = 267
2 x 2 = 4
Step 3) Put it all together to solve the problem:
267/178 + 4/178 = 271/178
= 3/2 + 2/89 = 271/178
It's that easy! Once again, the lowest common denominator (LCD) of 2 and 89 is as follows:
178
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.