You need to know the least common denominator (LCD) of 9 and 54 if you want to add or subtract two fractions with 9 and 54 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 9 and 54 is 54.
Here is a math problem example where you need to know the LCD of 9 and 54 to solve:
3/9 + 2/54 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
54/9 = 6
54/54 = 1
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 6 = 18
2 x 1 = 2
Step 3) Put it all together to solve the problem:
18/54 + 2/54 = 20/54
= 3/9 + 2/54 = 20/54
It's that easy! Once again, the lowest common denominator (LCD) of 9 and 54 is as follows:
54
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