First, let's turn both numbers into a fraction.
-2.4 would be -24/10.
5 1/3 would be 16/3.
(The 16 is the result of 5 groups of 3, that is five wholes, and the remaining 1/3)
To divide, you multiply the second number with the denominator and numerator on opposite sides.
(e.g. a/b divided by b/c = a/b x c/d)
-24/10 divided by 16/3
**remember, a negative number divided by a positive number = a negative**
-24/10 x 3/16 =
24x3 = 72
10x16 = 160
Simplify.
-3/5 (divided each side by 24)
There's your answer!