-4 to 3 power divided by -4 to 5 power?

(-4)3 divided by (-4)5 = (-4)(3-5) = (-4)-2 = 1/((-4)2) = 1/16

Or evaluate each one: (-4)3 = -64, and (-4)5 = -1024, then divide (-64)/(-1024) = 1/16.