You need to know the least common denominator (LCD) of 45 and 6 if you want to add or subtract two fractions with 45 and 6 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 45 and 6 is 90.
Here is a math problem example where you need to know the LCD of 45 and 6 to solve:
3/45 + 2/6 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
90/45 = 2
90/6 = 15
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 2 = 6
2 x 15 = 30
Step 3) Put it all together to solve the problem:
6/90 + 30/90 = 36/90
= 3/45 + 2/6 = 36/90
It's that easy! Once again, the lowest common denominator (LCD) of 45 and 6 is as follows:
90
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