Question: In Professor Plum's biology class there are 40 students. Of those students, 80 percent have puppies. Of those who have puppies, 25% also have parrots. How many students have both puppies and parrots?
Answer with step-by-step thinking: We start with the initial numbers of students, 40 and multiply that by .8 for 40 * 0.8 = 32 who own puppies. That the number of students with puppies, 32, and multiply that by .25 to find out how many own both puppies and parrots, 32 * 0.25 = 8 who own puppies and parrots. The answer is 8.
So the answer is 8.

Question: A company has 500 employees, each paid $12 per hour, working 10 hours a day, five days a week, 4 weeks a month. In August, the amount of work increased, and the company hired 200 more people. How much money does the company pay in total per month after the new hires?
Answer with step-by-step thinking: The total pay per employee in a day is 12 * 10 = $120. An employee works for 5 * 4 = 20 days in a month. The total amount of money paid to each employee monthly is 20 * 120 = $2400. When the number of employees increased to 500 + 200 = 700 after the new hires in August. The company pays a total of 700 * 2400 = $1680000 per month to its employees.
So the answer is 1680000.

Question: Chenny bought 9 plates at $2 each. She also bought spoons at $1.50 each. How many spoons did Chenny buy if she paid a total of $24 for the plates and spoon?
Answer with step-by-step thinking:
The cost of 9 plates is $2 x 9 = $18. So, Chenny paid $24 - $18 = $6 for the spoons. Therefore, she bought $6 / $1.50 = 4 spoons.
So the answer is 4.