You need to know the least common denominator (LCD) of 89 and 11 if you want to add or subtract two fractions with 89 and 11 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 89 and 11 is 979.
Here is a math problem example where you need to know the LCD of 89 and 11 to solve:
3/89 + 2/11 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
979/89 = 11
979/11 = 89
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 11 = 33
2 x 89 = 178
Step 3) Put it all together to solve the problem:
33/979 + 178/979 = 211/979
= 3/89 + 2/11 = 211/979
It's that easy! Once again, the lowest common denominator (LCD) of 89 and 11 is as follows:
979
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