Question: Susan earned $600 from babysitting over the summer. She went shopping and spent half of it on clothes. Then she spent half of what was left on books. How much money did she have left?
Answer: Step-by-step reasoning process: Susan spent 600 / 2 = 300 on clothes. After buying clothes she had 600 - 300 = 300 dollars left. She spent 300 / 2 = 150 dollars on books. She had 300 - 150 = 150 dollars left.
So the answer is 150.

Question: Paul is working at a university. He is part of a big project, which involves 70 scientists in total. Half of them are from Europe and one-fifth are from Canada. The rest are from the USA. How many scientists in this project are from the USA?
Answer: Step-by-step reasoning process: Of all the scientists taking part in the project, half of them are from Europe, which means 70 * 0.5 = 35 people. The number of researchers from Canada is 70 * 1 / 5 = 14 people. That means there are 70 - 35 - 14 = 21 researchers from the USA.
So the answer is 21.

Question: Los Angeles has 6 million people living in it. If half the population is women and 1/3 of the women work in retail, how many women work in retail in Los Angeles?
Answer: Step-by-step reasoning process: There are 3 million women in Los Angeles because 6,000,000 / 2 = 3,000,000. 1,000,000 women work in retail because 3,000,000 x (1 / 3) = 1,000,000.
So the answer is 1000000.

Question: Zane purchases 2 polo shirts from the 40% off rack at the men's store. The polo shirts are $50 each at the regular price. How much did he pay for the shirts?
Answer:
Step-by-step reasoning process: At regular price, the polo shirts are 2 x $50 = $100. At 40% off, he gets a discount of , $100 x 40% = $40. With this discount, the polo shirts cost $100 - $40 = $60.
So the answer is 60.