You need to know the least common denominator (LCD) of 27 and 2 if you want to add or subtract two fractions with 27 and 2 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 27 and 2 is 54.
Here is a math problem example where you need to know the LCD of 27 and 2 to solve:
3/27 + 2/2 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
54/27 = 2
54/2 = 27
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 2 = 6
2 x 27 = 54
Step 3) Put it all together to solve the problem:
6/54 + 54/54 = 60/54
= 3/27 + 2/2 = 60/54
It's that easy! Once again, the lowest common denominator (LCD) of 27 and 2 is as follows:
54
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