Question 354429
{{{3/7}}}{{{""+""}}}{{{2/9}}}
<pre>
Since denominators 7 and 9 have no common factors other than 1,
we find the LCD by multiplying them together:  {{{7*9=63}}}

We multiply the first fraction by {{{red(9/9)}}} and the second 
fraction by {{{red(7/7)}}}

{{{red(9/9)expr(3/7)}}}{{{""+""}}}{{{red(7/7)expr(2/9)}}}

Multiply numerators and denominators

{{{27/63}}}{{{""+""}}}{{{14/63}}}

Now add the numerators 27+14 = 41 and place the sum over the LCD

{{{41/63}}}

That's the final answer.  It does not reduce.

Edwin</pre>