A craft store makes a third of its sales in the fabric section, a quarter of its sales in the jewelry section, and the rest in the stationery section. They made 36 sales today. How many sales were in the stationery section? Let's think first. Chain of thought:
The craft store made 36 / 3 = 12 sales in the fabric section. It made 36 / 4 = 9 sales in the jewelry section. Thus, there were 36 - 12 - 9 = 15 sales in the stationery section.
Therefore, the answer is 15.