Question 82809
{{{(3/a)}}}
---------
{{{1/a - 1/(3a)}}}
:
{{{(3/a)}}}
---------  put the denominator fractions over a common denominator
{{{((3 - 1))/(3a)}}}
:
{{{(3/a)}}}
---------  
{{{(2)/(3a)}}}
:
Invert the dividing fraction and multiply:
{{{3/a}}} * {{{(3a)/2}}}
:
cancel out a and you have:
3 * {{{3/2}}} = {{{9/2}}}
:
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