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

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: 2/7+4/21+1/3 please help i need to show work also i need to know how to do this problem?      Log On


   

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) About Me  (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


If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim