They make 18 chicken burritos because when you do 24 beef burritos total divided by 4 beef burritos you get 6 beef then you muliply 6 by the number of chicken burrittos.
Qualitative has to do more with your senses, and quantitative is more about numbers. Quantitative would be something like the volume is 25.5 mL, but the liquid being blue would be qualitative since it has no numbers