Answer:
Step-by-step explanation:
330 milligrams is .33 grams.
The difference (if not asking for a number) is that the milligrams are a 1000th of a gram or 1/1000.
If the difference is asking for a number, the answer would be: 249.67
250-0.33
The answer should be one of these, though I cant promise it is. The simple fact is that there isn't a lot of information provided by you. Next time, I suggest giving more information about the question, such as what the topic is, what the question is asking for, and the subject. Please do not take offence, it is just simpler for everyone to figure out the answer to help you if we know what were looking for.