Question 276679
{{{(2/3)^(-2)(4/5)^(-1)}}}
A -1 as an exponent means "reciprocal of" so {{{(4/5)^(-1) = 5/4}}}
A -2 as an exponent means "reciprocal of the square" (or "square of the reciprocal") so {{{(2/3)^(-2) = (3/2)^2 = 9/4}}}
Substituting these into your expression we get:
{{{(9/4)(5/4)}}}
which simplifies to
{{{45/16}}}
which, as a mixed number is
{{{2&13/16}}}