Consider the Q and A. Q: Elsa and her sister watch an opera show every year at Central City Opera. Last year, opera seating cost $85 per ticket. This year, it costs $102. What is the percent increase in the cost of each ticket?
A: 20
What is the step-by-step reasoning process?
Step-by-step reasoning process: The ticket price increase is $102 - $85 = $17. So there is 17 / 85 x 100% = 20% increase of price.

Consider the Q and A. Q: Boston had .5 feet of snow on the first day of winter. The next day they got an additional 8 inches. Over the next 2 days, 2 inches of the snow melted. On the fifth day, they received another 2 times the amount of snow they received on the first day. How many feet of snow do they now have?
A: 2
What is the step-by-step reasoning process?
Step-by-step reasoning process: 12 inches is 1 foot and they received a .5 foot of snow on the first day so they received 12 * .5 = 6 inches of snow. The first day they had 6 inches and then received another 8 inches for a total of 6 + 8 = 14 inches. 2 inches melted from their 14 inches so that leaves 14 - 2 = 12 inches of snow. They received 2 times the amount as the first day's 6 inches of snow so that's 2 * 6 = 12 inches of snow. So they had 12 inches of snow and received another 12 inches of snow for a total of 12 + 12 = 24 inches. 12 inches is 1 foot and they have 24 inches of snow so they have 24 / 12 = 2 feet of snow.

Consider the Q and A. Q: There were 28 students inside a bus before stopping at an intersection. After stopping at an intersection, there were 58 students on the bus. What's 40% of the number of students who entered the bus at the intermediate stop?
A: 12
What is the step-by-step reasoning process?
Step-by-step reasoning process: At the intermediate stop, 58 - 28 = 30 students entered the bus before it stopped at the intersection. 40% of the number of students who entered the bus at the intermediate stop is 40 / 100 * 30 = 12.

Consider the Q and A. Q: Marie has 4 notebooks with 20 stamps each. She also has two binders with 50 stamps each. If she decides to only keep 1/4 of the stamps, how many stamps can she give away?
A: 135
What is the step-by-step reasoning process?
Step-by-step reasoning process:
Marie has 4 x 20 = 80 stamps from her notebooks. And she has 2 x 50 = 100 stamps from her binders. So she has a total of 80 + 100 = 180 stamps. Marie decided to keep 180 x 1 / 4 = 45 stamps only. Therefore, she can give away 180 - 45 = 135 stamps.