SOLUTION: what number could be used as a common denominator for adding the fractiopns 2/63,4/-35,and 8/21?

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Question 330646: what number could be used as a common denominator for adding the fractiopns 2/63,4/-35,and 8/21?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The product always works.
63*35*21 = 46305
Others also work, eg, 2205, 6615, 15435, and an infinite number of others.
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If you're taking a test, and time is important, use the product. It might not be the LCD, but it saves time and it works.