You need to know the least common denominator (LCD) of 3 and 67 if you want to add or subtract two fractions with 3 and 67 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 3 and 67 is 201.
Here is a math problem example where you need to know the LCD of 3 and 67 to solve:
3/3 + 2/67 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
201/3 = 67
201/67 = 3
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 67 = 201
2 x 3 = 6
Step 3) Put it all together to solve the problem:
201/201 + 6/201 = 207/201
= 3/3 + 2/67 = 207/201
It's that easy! Once again, the lowest common denominator (LCD) of 3 and 67 is as follows:
201
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