Question 7992
Let's take a guess and try to get rid of the 3i in the denominator.
{{{4/3i = 4(-3i)/(3i)(-3i)}}} [multiply top and bottom by -3i]
{{{-12i/9}}} [because 3i time i = -3 and -3 times -3 = 9]
{{{-4i/3}}}
About as simplified as it can get!