Question 25825
{{{a^(-4/5)w^(2/3)/(a^2*w^(5/3)))}}} 
Probably easiest to put everything to the top and negate the exponents that were on the bottom.
{{{a^(-4/5)*w^(2/3)*a^-2*w^(-5/3)}}}
Combine terms (add exponent of similar bases... see exponent rules)
{{{a^(-14/5)*w^-1}}}
Now take an term with a negative exponent (both in this case) and put them in the denominator:
{{{(1)/(a^(14/5)*w^1)}}}
Again, just go through the rules for exponents and try to rearrange terms until you get rid of negative exponents.