Final answer:
To determine which number does not represent the amount of pizza remaining, we can convert each option to a common form and compare. The number that does not represent the amount of pizza remaining is 30%.
Step-by-step explanation:
To determine which number does not represent the amount of pizza remaining, we need to understand the different ways pizza can be represented. In this case, the options given are in different forms: fraction (A and B), percentage (C), and decimal (D).
Option A, 4/12, is equivalent to 1/3, which means it represents the same amount of pizza as option B. Option C, 30%, represents a different amount because it is equal to 3/10. Option D, 0.3, represents a different amount because it is equal to 3/10 as well. Therefore, the number that does not represent the amount of pizza remaining is C. 30%.