First of all, you have to change 23 1/3 to improper fraction. It will be 47/3. Anyway, whenever you are dividing by a fraction, you have to turn the fraction upside down and change the division to multiplication. So;
24 ÷ 47/3
24 x 3/47
72/47
So your answer is 72/47. Hope i helped. Have a nice day.