The town of Centerville spends 15% of its annual budget on its public library. Centerville spent $3,000 on its public library and 24% on the public parks. How much is left of the annual budget? Give the rationale and then the answer.
Let's think step by step. The entire budget of Centerville is $3000 / 0.15 = $20,000. The budget for the parks is $20,000 * 0.24 = $4,800. After the park and the library there will be $20,000 - ($3,000 + $4,800) = $12,200 left in the budget.. The answer is: 12200.

Eric sorted 150 colored pencils into 5 containers for his art class. Before class, another teacher brought him 30 more pencils. How many can he evenly distribute between the five containers now? Give the rationale and then the answer.
Let's think step by step. Before the extra colored pencils, he had 150 / 5 = 30 colored pencils in each container. With the other colored pencils, he is given he now has 150 + 30 = 180 colored pencils. If you distribute them evenly each container should have 180 / 5 = 36 colored pencils.. The answer is: 36.

John chops down 30 trees. From each tree, he can make 25 planks. A table takes 15 planks to make and sells for $300. He paid $3000 for all the labor. How much profit did he make? Give the rationale and then the answer.
Let's think step by step. He got 30 * 25 = 750 planks. So he can make 750 / 15 = 50 tables. That means he makes 50 * 300 = $15000. So his profit was 15000 - 3000 = $12000.. The answer is: 12000.