Post your answer as a comment (remember to use your initials for your name!)
Read it carefully and identify the important information. It might help to imagine it as a story, or draw the problem as a quick doodle.
Being healthy, Mr N buys a 2.5 litre bottle of olive oil. He uses 567ml in one week, then 0.65 litres the next week. How much does he have left in the bottle by the end of the second week?