Question 823768
Is this it?
{{{ ( 4k^6 ) / ( 7k^5 ) }}} 
If so,
You know that {{{ k^6 = k*k*k*k*k*k }}}
and {{{ k^5 = k*k*k*k*k }}}
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So, what you have is:
{{{ ( 4*k*k*k*k*k*k ) / ( 7*k*k*k*k*k ) }}}
The k's on the top and bottom all cancel 
except for one k left over on top, so
you are left with:
{{{ ( 4*k) / 7 = (4/7)*k }}}