You need to know the least common denominator (LCD) of 90 and 67 if you want to add or subtract two fractions with 90 and 67 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 90 and 67 is 6030.
Here is a math problem example where you need to know the LCD of 90 and 67 to solve:
3/90 + 2/67 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
6030/90 = 67
6030/67 = 90
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 67 = 201
2 x 90 = 180
Step 3) Put it all together to solve the problem:
201/6030 + 180/6030 = 381/6030
= 3/90 + 2/67 = 381/6030
It's that easy! Once again, the lowest common denominator (LCD) of 90 and 67 is as follows:
6030
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