Hello!

Greg’s thought process for this question was edited out. So, I don’t understand how he got **7.2** as the answer.

My answer to this question was *18 grams.*

- Initial mixture had 40% vinegar, which is 12 grams.
- This means, we have 18 grams of oil in this mixture.
- The problem asks us about how many more grams of oil we should add to this mixture to make the vinegar 25%.
- To make the 12 grams of vinegar-
*25% of the mixture*, we need 36 grams of oil, of which 18 is already in the mixture. - So the answer is 18 grams.
- New mixture ratio of vinegar : oil is
**12:36**

Could anybody confirm if my thought process and answer is correct? If not, could you help me out?