Question 58280
Let C = 64/27. Then find C with exponent -2/3.
{{{(64/27)^(-2/3)}}}  Flip the fraction and change the sign of the exponent.
{{{(27/64)^(2/3)}}}  Notice that 27=3^3 and 64=4^3
{{{(3^3/(4^3))^(2/3)}}}  Multiply the inner exponents by the outer exponents.
{{{(3^(3*2/3))/(4^(3*2/3))}}}  Cancel the 3's
{{{3^2/4^2}}}  Apply the squares
{{{9/16}}}  Pat yourself on the back your done.
Happy Calculating!!!