a. The quantity of food that 1 cat can eat is 0.67 (2/3) of a can per meal.
b) A suitable formula that Ronnie can use to determine the cans of food to use per meal is = 0.67x (0.67 X x) where x = number of cats.
c) With 12 cats, the number of cans of food per meal that Ronnie should feed the cats = 8 cans (0.67 x 12).
Thus, a cat can only eat about 67% of a can per meal and 12 cats can eat 8 cans per meal.
Link to related question on multiplication at https://brainly.com/question/12353086