You need to know the least common denominator (LCD) of 66 and 65 if you want to add or subtract two fractions with 66 and 65 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 66 and 65 is 4290.
Here is a math problem example where you need to know the LCD of 66 and 65 to solve:
3/66 + 2/65 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
4290/66 = 65
4290/65 = 66
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 65 = 195
2 x 66 = 132
Step 3) Put it all together to solve the problem:
195/4290 + 132/4290 = 327/4290
= 3/66 + 2/65 = 327/4290
It's that easy! Once again, the lowest common denominator (LCD) of 66 and 65 is as follows:
4290
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