* A part of something: For example, "What portion of the cake did you eat?"
* A serving size: For example, "The restaurant serves portions that are too large."
* A share or allotment: For example, "Each person received an equal portion of the inheritance."
To understand what you mean by "portion", please tell me:
* What is the item you are asking about? (e.g., food, money, land)
* What is the context of the question? (e.g., a recipe, a financial transaction, a legal agreement)
Once I have more information, I can help you figure out how much a portion is.