Question 536185
<pre>
The average of two numbers is always between them, so we average them

{{{(1/5 + 2/3)/2}}}

Multiply top and bottom by LCD = 15:

{{{(red(15)(1/5 + 2/3))/(red(15)2)}}}

{{{red(15)(1/5) + red(15)(2/3)))/(red(15)2)}}}

{{{(3 + 10)/30}}}

{{{13/30}}}

Edwin</pre>