Question: Hannah hangs a 2 foot by 4 foot painting on a 5 foot by 10 foot wall. What percentage of the wall is taken up by the painting?
Answer: Step-by-step reasoning process: First find the area of the painting: 2 feet * 4 feet = 8 square feet. Then find the area of the wall: 5 feet * 10 feet = 50 square feet. Then divide the area of the painting by the area of the wall and multiply by 100% to express the answer as a percentage: 8 square feet / 50 square feet * 100% = 16%.
So the answer is 16.

Question: Jerry is making cherry syrup. He needs 500 cherries per quart of syrup. It takes him 2 hours to pick 300 cherries and 3 hours to make the syrup. How long will it take him to make 9 quarts of syrup?
Answer: Step-by-step reasoning process: First find how many cherries Jerry can pick in one hour: 300 cherries / 2 hours = 150 cherries / hour. Then multiply the number of quarts of syrup by the number of cherries per quart to find the total number of quarts Jerry needs: 500 cherries / quart * 9 quarts = 4500 cherries. Then divide the total number of cherries by the number of cherries he picks per hour to find the number of hours the cherry - picking takes: 4500 cherries / 150 cherries / hour = 30 hours. Then add the time it takes him to make the syrup to find the total time: 30 hours + 3 hours = 33 hours.
So the answer is 33.

Question: Two-thirds of the class have brown eyes. Half of the students with brown eyes have black hair. If there are 6 students in the class with brown eyes and black hair, how many students are there in total?
Answer: Step-by-step reasoning process: There are 6 * 2 = 12 students with brown eyes and hair of any color. There are 12 * 3 / 2 = 18 students in total.
So the answer is 18.

Question: Daphney buys 5 kg of potatoes at the supermarket. If 2 kg of potatoes costs $6, how much will she pay?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Step-by-step reasoning process: The price per kilogram of potatoes is $6 / 2 = $3. To buy 5 kg of potatoes, she will have to pay 5 * $3 = $15.
So the answer is 15.