Question: Ali is collecting bottle caps. He has 125 bottle caps. He has red ones and green ones. If he has 50 red caps, what percentage of caps are green?
Answer with step-by-step thinking: He has 75 green caps because 125 - 50 = 75. The proportion of caps that are green is .6 because 75 / 125 = .6. The percentage that are green is 60 because .6 x 100% = 60%.
So the answer is 60.


Question: Reggie's father gave him $48. Reggie bought 5 books, each of which cost $2. How much money does Reggie have left?
Answer with step-by-step thinking: The cost of the books is 5 × $2 = $10. Reggie has $48 − $10 = $38 left.
So the answer is 38.


Question: Cary walks 3 miles round-trip to the grocery store, where he buys and eats a candy bar with 200 calories. If Cary burns 150 calories per mile walked, what's Cary's net calorie deficit (expressed as a positive number)?
Answer with step-by-step thinking:

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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First, find how many calories the walk burned by multiplying the calories burned per mile by the number of miles Cary walked: 3 miles * 150 calories / mile = 450 calories. Then subtract the calories Corey ate to find the net calories Cary burned: 450 calories - 200 calories = 250 calories.
So the answer is 250.