[Question]Rachel is stuffing envelopes. She has eight hours to complete the task, and there are 1,500 envelopes. In the first hour, Rachel stuffs 135 envelopes. The second hour she stuffs 141 envelopes. How many envelopes will Rachel need to stuff per hour to finish the job?
[Answer]Rachel has 1500 - 135 - 141 envelopes = 1224 envelopes remaining to stuff. Rachel has 8 hours - 2 hours = 6 hours left to finish the task. Rachel needs to stuff 1224 envelopes / 6 hours = 204 envelopes per hour. The answer is 204.
Q: Charles can earn $15 per hour when he housesits and $22 per hour when he walks a dog. If he housesits for 10 hours and walks 3 dogs, how many dollars will Charles earn?
A: Housesitting = 15 * 10 = 150. Dog walking = 22 * 3 = 66. Total earned is 150 + 66 = $216. The answer is 216.
Question: A driver travels 30 miles per hour for 3 hours and 25 miles per hour for 4 hours to deliver goods to a town every day from Monday to Saturday. How many miles does the driver travel in a week?
Answer: The driver travels (3 hours * 30 mph) + (25 mph * 4 hours) = 190 miles per day. From Monday to Saturday he travels in total 190 miles / day * 6 days = 1,140 miles in a week. The answer is 1140.
[Question]A bag full of sugar weighs 16 kg. A bag full of salt weighs 30 kg. If you remove 4 kg from the combined weight of these two bags, how much do the bags now weigh?
[Answer]The bags together weigh 16 + 30 = 46 kg. Removing the 4 kg, the bags will weigh 46 - 4 = 42 kg. The answer is 42.
Q: Ned is an explosives specialist racing to deactivate a time bomb on the top floor of a building. The building has twenty flights of stairs to the top floor, and Ned can run up one flight of stairs in eleven seconds. The time bomb has 72 seconds left on the timer, and Ned has spent 165 seconds running up the stairs. How many seconds will Ned have to diffuse the bomb when he reaches it?
A: Ned has gone up 165 / 11 = 15 flights of stairs. Thus, he has 20 - 15 = 5 flights of stairs left to run up. He will spend 5 * 11 = 55 seconds running up the remaining stairs to the bomb. Therefore, he will have 72 - 55 = 17 seconds to defuse the bomb. The answer is 17.
Question: Asia bought a homecoming dress on sale for $140. It was originally priced at $350. What percentage off did she get at the sale?
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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Asia saved $350 - $140 = $210 on the dress. That means she saved $210 / $350 = 0.60 or 60% off on the dress. The answer is 60.