SOLUTION: 2/7+4/21+1/3 please help i need to show work also i need to know how to do this problem?

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Question 417637: 2/7+4/21+1/3 please help i need to show work also i need to know how to do this problem?
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
In order to add fractions, the denominators must all be the same. So let's get all the denominators equal to the LCD 21.


2/7+4/21+1/3 = (2/7)*(3/3)+4/21+(1/3)*(7/7) = 6/21+4/21+7/21 = (6+4+7)/21 = 17/21


So 2/7+4/21+1/3 = 17/21


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