You need to know the least common denominator (LCD) of 67 and 7 if you want to add or subtract two fractions with 67 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 67 and 7 is 469.
Here is a math problem example where you need to know the LCD of 67 and 7 to solve:
3/67 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
469/67 = 7
469/7 = 67
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 7 = 21
2 x 67 = 134
Step 3) Put it all together to solve the problem:
21/469 + 134/469 = 155/469
= 3/67 + 2/7 = 155/469
It's that easy! Once again, the lowest common denominator (LCD) of 67 and 7 is as follows:
469
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